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1. Identifying muon rings in VERITAS data using convolutional neural networks trained on images classified with Muon Hunters 2

Author

Matthew Lundy, A. Brill, M. Capasso, Hugh Dickinson, Manel Errando, T. J. Williamson, S. Kumar, S. Patel, Vladimir Vassiliev, M. J. Lang, David Hanna, P. Moriarty, John L. Quinn, Orel Gueta, donggeun tak, David A. Williams, Michael Laraia, Sameer Patel, Jodi Christiansen, P. Wilcox, Thomas Brian Humensky, C. E. McGrath, Alasdair E. Gent, R.R. Prado, Avery Archer, K. Ragan, M. Kertzman, C. Adams, M. Nievas-Rosillo, J. H. Buckley, Reshmi Mukherjee, David Kieda, Tobias Kleiner, A. J. Chromey, A. D. Falcone, Philip Kaaret, James M. Ryan, Wystan Benbow, Lucy Fortson, A. N. Otte, R. A. Ong, C. Giuri, K. A. Farrell, G. M. Foote, Deivid Ribeiro, Stephen Serjeant, E. Roache, Martin Pohl, Binita Hona, Jamie Holder, G. H. Sembroski, Daniel Nieto, K. Pfrang, S. O'Brien, Kevin Flanagan, Amanda Weinstein, Gary Gillanders, Marcos Santander, Q. Feng, I. Sadeh, Darryl Wright, R. Shang, W. Jin, Olivier Hervet, Gernot Maier, P. T. Reynolds, Amy Furniss, and E. Pueschel

Subjects
Muon, Physics::Instrumentation and Detectors, Calibration (statistics), Computer science, business.industry, Pattern recognition, Convolutional neural network, law.invention, Image (mathematics), Hough transform, Telescope, Identification (information), law, Computer Science::Computer Vision and Pattern Recognition, False positive paradox, High Energy Physics::Experiment, Artificial intelligence, business
Abstract

Muons from extensive air showers appear as rings in images taken with imaging atmospheric Cherenkov telescopes, such as VERITAS. These muon-ring images are used for the calibration of the VERITAS telescopes, however the calibration accuracy can be improved with a more efficient muon-identification algorithm. Convolutional neural networks (CNNs) are used in many state-of-the-art image-recognition systems and are ideal for muon image identification, once trained on a suitable dataset with labels for muon images. However, by training a CNN on a dataset labelled by existing algorithms, the performance of the CNN would be limited by the suboptimal muon-identification efficiency of the original algorithms. Muon Hunters 2 is a citizen science project that asks users to label grids of VERITAS telescope images, stating which images contain muon rings. Each image is labelled 10 times by independent volunteers, and the votes are aggregated and used to assign a `muon' or `non-muon' label to the corresponding image. An analysis was performed using an expert-labelled dataset in order to determine the optimal vote percentage cut-offs for assigning labels to each image for CNN training. This was optimised so as to identify as many muon images as possible while avoiding false positives. The performance of this model greatly improves on existing muon identification algorithms, identifying approximately 30 times the number of muon images identified by the current algorithm implemented in VEGAS (VERITAS Gamma-ray Analysis Suite), and roughly 2.5 times the number identified by the Hough transform method, along with significantly outperforming a CNN trained on VEGAS-labelled data.

Published
2021

2. TeV and optical observations of the Be/pulsar binary 1A0535+262 during the 2020 giant outburst

Author

Matthew Lundy, Massimo Capasso, Rene Ong, Iftach Sadeh, Philip Kaaret, Weidong Jin, Wystan Benbow, Reshmi Mukherjee, Raul Prado, Sameer Patel, Patrick Moriarty, Gernot Maier, Amy Furniss, Ken Ragan, David Williams, James Buckley, Lucy Fortson, John Quinn, Jamie Holder, Chiara Giuri, Elisa Pueschel, Daniel Nieto, Colin Adams, Stephan O'Brien, Deivid Ribeiro, Konstantin Pfrang, Orel Gueta, Gregory M Foote, Amanda Weinstein, Sajan Kumar, Tyler Williamson, Donggeun Tak, Conor McGrath, Tobias Kai Kleiner, Martin Pohl, Paul Reynolds, Binita Hona, David Hanna, Marcos Santander, Glenn Sembroski, Sonal Ramesh Patel, Manel Errando, Mary Kertzman, Olivier Hervet, Mireia Nievas-Rosillo, Mark Lang, Emmet Roache, Thomas Brian Humensky, Ruo-Yu Shang, Vladimir Vassiliev, Alisha Chromey, Abe Falcone, Jodi Christiansen, Adam Otte, Alasdair E. Gent, Aryeh Brill, James Ryan, Kayla Farrell, Gary Gillanders, Qi Feng, Avery Archer, and David Kieda

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Astrophysics::High Energy Astrophysical Phenomena, Gamma ray, Astrophysics::Instrumentation and Methods for Astrophysics, Binary number, FOS: Physical sciences, Cosmic ray, Context (language use), Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Binary pulsar, law.invention, Pulsar, law, Astrophysics - High Energy Astrophysical Phenomena, Cherenkov radiation, Flare
Abstract

1A 0535+262 is a Be X-ray binary pulsar and one of the only galactic pulsar systems to show radio jet emission. Characterizing the very high energy emission (VHE, >100 GeV) in these extreme microquasars is critical to understanding their contribution to the origin of galactic cosmic rays. The 2020 giant outburst of this system, where X-ray fluxes exceeded 12 Crab, marked a rare opportunity to investigate the gamma-ray and rapid optical variability of these transient systems while in such an extreme state. This month of activity marked the brightest flare measured in this system. VERITAS's developing optical capabilities in tandem with the ability to measure TeV gamma rays allowed for a unique campaign to be undertaken. VERITAS's observations of this system during the outburst will be presented in the context of observations at lower energies and previous observations of this system by imaging atmospheric Cherenkov telescopes.

Published
2021

3. Gamma-ray and Optical Observations of Repeating Fast Radio Bursts with VERITAS

Author

Matthew Lundy, Massimo Capasso, Rene Ong, Iftach Sadeh, Philip Kaaret, Weidong Jin, Wystan Benbow, Reshmi Mukherjee, Raul Prado, Sameer Patel, Patrick Moriarty, Gernot Maier, Amy Furniss, Ken Ragan, David Williams, James Buckley, Lucy Fortson, John Quinn, Jamie Holder, Chiara Giuri, Elisa Pueschel, Daniel Nieto, Colin Adams, Stephan O'Brien, Deivid Ribeiro, Konstantin Pfrang, Orel Gueta, Gregory M Foote, Amanda Weinstein, Sajan Kumar, Tyler Williamson, Donggeun Tak, Conor McGrath, Tobias Kai Kleiner, Martin Pohl, Paul Reynolds, Binita Hona, David Hanna, Marcos Santander, Glenn Sembroski, Sonal Ramesh Patel, Manel Errando, Mary Kertzman, Olivier Hervet, Mireia Nievas-Rosillo, Mark Lang, Emmet Roache, Thomas Brian Humensky, Ruo-Yu Shang, Vladimir Vassiliev, Alisha Chromey, Abe Falcone, Jodi Christiansen, Adam Otte, Alasdair E. Gent, Aryeh Brill, James Ryan, Kayla Farrell, Gary Gillanders, Qi Feng, Avery Archer, and David Kieda

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Millisecond, Fast radio burst, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Theoretical models, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Magnetar, Radio telescope, Rapid rise, Astrophysics - High Energy Astrophysical Phenomena
Abstract

Fast radio burst (FRBs) are an exciting class of bright, extragalactic, millisecond radio transients. The recent development of large field-of-view (FOV) radio telescopes has caused a rapid rise in the number of identified single burst and repeating FRBs. This has allowed for the extensive multi-wavelength follow-up to search for the potential counterparts predicted by theoretical models. New observations of similar radio transients in Galactic magnetars like SGR 1935+2154 have continued to motivate the search for rapid optical and very-high-energy (VHE, >100 GeV) counterparts. Since 2016 VERITAS has engaged in an FRB observing campaign to search for the prompt optical, and VHE emission from multiple repeating FRBs. We present these new results from VERITAS observations of five repeating sources including data taken simultaneously with bursts observed by the CHIME radio telescope.

Published
2021

4. Inspection of Electronics Components for Cryogenic Temperature Operations

Author

Lucas W. Koester, Amanda Weinstein, Frank Krennrich, Daniel J. Barnard, J. D. Eisch, Leonard J. Bond, Zhan Zhang, and Navaneeth Poonthottathil

Subjects
010302 applied physics, Materials science, business.industry, Nuclear engineering, Integrated circuit, 01 natural sciences, law.invention, Reliability (semiconductor), Mechanics of Materials, law, Nondestructive testing, 0103 physical sciences, Liquid argon, Electronics, Neutrino, Safety, Risk, Reliability and Quality, Cryogenic temperature, business, 010301 acoustics, Civil and Structural Engineering, Electronic circuit
Abstract

Electronics operating at cryogenic temperatures play a critical role in future science experiments and space exploration programs. The Deep Underground Neutrino Experiment (DUNE) uses a cold electronics system for data taking. Specifically, it utilizes custom-designed Application Specific Integrated Circuits (ASICs). The main challenge is that these circuits will be immersed in liquid Argon and that they need to function for 20+ years without any access. Ensuring quality is critical, and issues may arise due to thermal stress, packaging, and manufacturing-related defects: if undetected, these could lead to long-term reliability and performance problems. This paper reports an investigation into non-destructive evaluation techniques to assess their potential use in a comprehensive quality control process during prototyping, testing, and commissioning of the DUNE cold electronics system. Scanning acoustic microscopy (SAM) was used to investigate permanent structural changes in the ASICs associated with thermal cycling between room and cryogenic temperatures. Data are assessed using a correlation analysis, which can detect even minimal changes happening inside the ASICs.

Published
2021

5. VERITAS follow-up observation of the blazar TXS 0506+056

Author

Weidong Jin, RileyAnne Sharpe, Massimo Capasso, Rene Ong, Iftach Sadeh, Philip Kaaret, Wystan Benbow, Reshmi Mukherjee, Raul Prado, Matthew Lundy, Sameer Patel, Patrick Moriarty, Gernot Maier, Amy Furniss, Ken Ragan, David Williams, James Buckley, Lucy Fortson, John Quinn, Jamie Holder, Chiara Giuri, Elisa Pueschel, Daniel Nieto, Colin Adams, Stephan O'Brien, Deivid Ribeiro, Konstantin Pfrang, Orel Gueta, Gregory M Foote, Amanda Weinstein, Sajan Kumar, Tyler Williamson, Donggeun Tak, Conor McGrath, Tobias Kai Kleiner, Martin Pohl, Paul Reynolds, Binita Hona, David Hanna, Marcos Santander, Glenn Sembroski, Sonal Ramesh Patel, Manel Errando, Mary Kertzman, Olivier Hervet, Mireia Nievas-Rosillo, Mark Lang, Emmet Roache, Thomas Brian Humensky, Ruo-Yu Shang, Vladimir Vassiliev, Alisha Chromey, Abe Falcone, Jodi Christiansen, Adam Otte, Alasdair E. Gent, Aryeh Brill, James Ryan, Kayla Farrell, Gary Gillanders, Qi Feng, Avery Archer, and David Kieda

Subjects
Physics, High Energy Astrophysical Phenomena (astro-ph.HE), High energy, Astrophysics::High Energy Astrophysical Phenomena, Flux, FOS: Physical sciences, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 13. Climate action, Observatory, QUIET, Neutrino, Astrophysics - High Energy Astrophysical Phenomena, Blazar, Event (particle physics)
Abstract

The gamma-ray blazar TXS 0506+056 was found with an enhanced gamma-ray emission state in spatial and temporal coincidence with the IceCube high energy neutrino event IC170922A. This is the most significant association by far between a high-energy neutrino event and a blazar in a flaring state. Studying the time evolution and spectral behavior of the blazar emission may help in identifying the sources of the diffuse neutrino flux observed by IceCube and the origin of energetic cosmic rays. TXS 0506+056 was detected by the VERITAS gamma-ray observatory with a significance of 5.8 standard deviations above 110 GeV in a 35 hour data set collected between September 23, 2017 and February 6, 2018. Here we will present results from recent VERITAS observations and an associated multiwavelength campaign, collected between October 10, 2018 to March 1, 2021. A relatively quiet very high energy gamma-ray emission state was observed during this time period, and flux upper limits are used to constrain the potential variability of this blazar.

Published
2021
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6. An image-based array trigger for imaging atmospheric Cherenkov telescope arrays

Author

Frank Krennrich, Gary Drake, Karen Byrum, J. D. Eisch, Amanda Weinstein, John S. Anderson, and Hugh Dickinson

Subjects
Nuclear and High Energy Physics, Discriminator, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Field of view, 01 natural sciences, law.invention, Telescope, Optics, law, 0103 physical sciences, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Instrumentation, Cherenkov radiation, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Pixel, 010308 nuclear & particles physics, business.industry, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma-ray astronomy, Cherenkov Telescope Array, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Parallax, business
Abstract

It is anticipated that forthcoming, next generation, atmospheric Cherenkov telescope arrays will include a number of medium-sized telescopes that are constructed using a dual-mirror Schwarzschild-Couder configuration. These telescopes will sample a wide ($8^{\circ}$) field of view using a densely pixelated camera comprising over $10^{4}$ individual readout channels. A readout frequency congruent with the expected single-telescope trigger rates would result in substantial data rates. To ameliorate these data rates, a novel, hardware-level Distributed Intelligent Array Trigger (DIAT) is envisioned. A copy of the DIAT operates autonomously at each telescope and uses reduced resolution imaging data from a limited subset of nearby telescopes to veto events prior to camera readout {and any subsequent network transmission of camera data that is required for centralized storage or aggregation}. We present the results of Monte-Carlo simulations that evaluate the efficacy of a "Parallax width" discriminator that can be used by the DIAT to efficiently distinguish between genuine gamma-ray initiated events and unwanted background events that are initiated by hadronic cosmic rays., 22 pages, 12 figures. Accepted for publication in NIMA

Published
2018

8. Combined Dark Matter searches towards dwarf spheroidal galaxies with Fermi-LAT, HAWC, HESS, MAGIC and VERITAS

Author

Dirk Lennarz, Luis Villaseñor, Gernot Maier, Anne Lemiere, Daniel Rosa-Gonzalez, Samuel Timothy Spencer, Wystan Benbow, Victor Barbosa Martins, Raul Prado, Arache Djannati-Ataï, Regis Terrier, Dan Parsons, Francisco Salesa Greus, Dmitriy Kostunin, Joshua Wood, Carlo Romoli, César Alvarez, Carlo van Rensburg, Massimo Capasso, Sajan Kumar, P. Reichherzer, Anton Dmytriiev, Stefan Ohm, Chiara Giuri, Brian van Soelen, G. Peron, Christian Stegmann, Emma Ona-Wilhelmi, S. J. Fegan, Alison Peisker, Hawc, Garret Cotter, Gary Gillanders, Zhiqiu Huang, Krzysztof Katarzynski, Filiberto Hueyotl-Zahuantitla, Ian Herzog, D. A. Prokhorov, K. Kosack, Halim Ashkar, Fabian Leuschner, Manami Sasaki, Michael Schneider, Joe Lundeen, Markus Boettcher, Brian Humensky, Isak Delberth Davids, A. Fiasson, Stefan Wagner, Andreas Zech, Yasunobu Uchiyama, David Kieda, Michael DuVernois, Albert Seyffert, Gianluca Giavitto, Qi Feng, Andreas Specovius, Andrew James Smith, Catherine Boisson, L. Mohrmann, Roberta Zanin, Marek Jamrozy, Tomás Capistrán Rojas, K. Nakashima, Jamie Holder, Hao Zhou, Thomas Lohse, Mireia Nievas-Rosillo, Samuel Zouari, Ira Jung, Sebastian Panny, K. Bernloehr, Deivid Ribeiro, Andrea Santangelo, Kristi Engel, Josefa Becerra Gonzalez, Thomas Tavernier, Ke Fang, Rishi Babu, Yu Wun Wong, Gerd J. Kunde, Jean-Pierre Ernenwein, Henrike Fleischhack, P. T. O'Brien, Clemens Hoischen, A. A. Zdziarski, Kelly Malone, Helene Sol, Markus Holler, Manel Errando, Atreyee Sinha, Francois Brun, Heinrich J. Völk, Sumari Hattingh, Kirsten Tollefson, Johann van der Walt, Q. Remy, Felix Jankowsky, Samridha Kunwar, Johannes Veh, M. Fuessling, P. Vincent, Harm Schoorlemmer, Stefano Gabici, Miguel Mostafa, Tyler Williamson, Jacek Niemiec, Michal Ostrowski, J.-P. Lenain, Israel Martinez Castellanos, Felix Aharonian, Tadayuki Takahashi, Gerd Puehlhofer, Lei Sun, Jesús Martínez-Castro, Pooja Surajbali, Andrés Sandoval, Hugh Spackman, Takaaki Tanaka, Segev BenZvi, Alexandre Marcowith, Felix Werner, Olaf Reimer, Vincent Marandon, Alberto Carramiñana, S. Steinmassl, Mary Kertzman, Hannes Thiersen, Victor Doroshenko, Michael Backes, Hannah Jhee, G. Lamanna, Marcos Santander, Angel Noel, W. Jin, Gus Sinnis, B. Rudak, Alasdair E. Gent, Kathrin Egberts, Jonathan Mackey, Fernando Ureña-Mena, Paolo Marchegiani, Sonal Ramesh Patel, Laenita Lorraine Oberholzer, Tim Holch, Sami Caroff, Heiko Salzmann, E. Kasai, Alison Mitchell, Gregory Foote, Nukri Komin, Tom Armstrong, Michelle Hui, Ruo-Yu Shang, Binita Hona, Raquel Diaz Hernandez, Vardan Baghmanyan, Celine Armand, Alejandro Lara, David Berley, Hector Rueda Ricarte, Nissim Illich Fraija, Naomi Tsuji, Gaurang Yodh, Stefan Funk, Alicja Wierzcholska, Conor McGrath, Gerard Fontaine, C. Moore, Vikas Joshi, Dorit Glawion, T. Chand, M. U. Nisa, M.-H. Grondin, Arnaud Mares, David Sanchez, Ernesto Belmont-Moreno, Thomas Murach, Eucario Gonzalo Pérez Pérez, Paul Reynolds, Ignacio Taboada, Xiaojie Wang, Lucy Fortson, Martin Tluczykont, Thomas Brian Humensky, Juan de Dios Álvarez Romero, Robert Ellsworth, Hester Schutte, Justine Devin, Constantin Steppa, Richard White, Rachel Simoni, Karen S. Caballero Mora, Elisa Pueschel, Jason Fan, Tomasz Bulik, Lukas Nellen, Malgorzata Curlo, Lente Dreyer, J. Patrick Harding, Gilles Maurin, Humberto Martínez Huerta, Riaan Steenkamp, Arnulfo Zepeda, Johannes Schaefer, Werner Hofmann, Jim Hinton, Michael Punch, S. Sailer, Dmitry Khangulyan, Sergio Hernández Cadena, Charles Thorpe-Morgan, M. Hörbe, Stephan O'Brien, Ramin Marx, John L. Quinn, J. F. Glicenstein, V. Sahakian, M. Panter, Mora Durocher, U. Katz, Jacco Vink, Umberto Cotti, Tobias Kleiner, Petra Hüntemeyer, David Huber, Ullrich Schwanke, Diego Garcia Aguilar, Vladimir Vassiliev, Oscar Martinez, J. Bolmont, Cederik León de León, Brian Fick, Laura Olivera-Nieto, A. Yusafzai, David Hanna, James Buckley, Lorenzo Diaz, Yves Gallant, Guillermo García-Torales, Arun Babu Kollamparambil, James Ryan, Kayla Farrell, Sabrina Casanova, Bruno Khelifi, María Catalina Espinoza Hernández, Jorge Antonio Morales Soto, Mateo Fernandez Alonso, Matthew Lundy, Faical Ait-Benkhali, Jean Damascene Mbarubucyeye, Wlodek Kluzniak, Jorge Luis Flores, Ibrahim Torres, Jordan A. Goodman, Anita Reimer, Adam Otte, Eduardo Moreno Barbosa, M. J. Lang, Frank M. Rieger, Elijah Willox, Colin Adams, Pedro Miranda-Romagnoli, Louis Du Plessis, Andrea Albert, Orel Gueta, Anna Barnacka, Brenda Dingus, Gašper Kukec Mezek, Hazal Goksu, Jorge Cotzomi, William H. Lee, Ruben Alfaro, Glenn Sembroski, David A. Williams, Eduardo de la Fuente, Anu Kundu, Dezhi Huang, Brian Reville, Connor Duffy, Edna Ruiz-Velasco, Anna Luashvili, Alisha Chromey, Konstantin Pfrang, L. Giunti, Philip Kaaret, Maria Magdalena González, Olivier Hervet, Hermes Leon Vargas, Sébastien Le Stum, Amanda Weinstein, Aryeh Brill, James Davies, Ken Ragan, Santiago Pita, Juan Carlos Arteaga Velazquez, Jason Lee, Sabrina Einecke, Lukasz Stawarz, Iryna Lypova, Julie McEnery, Sara Coutiño de Leon, Dieter Horns, R. J. Tuffs, Christo Venter, Meghan Tanner, Monica Barnard, B. Bi, Yvonne Becherini, Colas Rivière, Iftach Sadeh, Lott Frans, Mischa Breuhaus, Pauline Chambery, C. Levy, Jose Luis García-Luna, Michelle Tsirou, D. Malyshev, Ramiro Torres Escobedo, Hassan Abdalla, Hambeleleni Ndiyavala, Chang Dong Rho, Jhilik Majumdar, Martin Pohl, Mathieu Bony, Oguzhan Anguener, Hend Yassin, Gwenael Giacinti, Manuel Meyer, Arturo Iriarte, John Matthews, Kirsty Feijen, Ahron S. Barber, Floriane Cangemi, Fernando Garfias, R. A. Ong, Thomas Weisgarber, Thomas Bylund, Gilgamesh Luis-Raya, Rowan Batzofin, Mathieu Naurois, Jacques Muller, Avery Archer, Andreas Quirrenbach, Anushka Udara Abeysekara, José Serna-Franco, Hugo Alberto Ayala Solares, Davit Zargaryan, Rubén López-Coto, Reshmi Mukherjee, Andreas Zmija, Guillem Marti'i-Devesa, Sameer Patel, M. Lemoine-Goumard, Roberto Noriega-Papaqui, Gaëtan Fichet de Clairfontaine, Axel Donath, A. W. Chen, Michael Kreter, Yunior Pérez Araujo, Anna Lia Longinotti, Michael Zacharias, Kleopas Shiningayamwe, Robert Brose, Fabian Schüssler, Emmanuel Moulin, Patrick Moriarty, Edna Ruiz Velasco, Michael Newbold, Oscar Chaparro-Amaro, J. T. Linnemann, Lenka Tomankova, Jodi Christiansen, Jaqueline Catalano, Ian James Watson, R. Konno, Andrew Taylor, C. Arcaro, Jason John Watson, Gavin Rowell, Daniel Omar Avila Rojas, Denys Malyshev, Emmet Roache, Rhiannon Turner, Chad Brisbois, Mohanraj Senniappan, José Roberto Angeles Camacho, Daniel Nieto, V. Poireau, Jimmy N.S. Shapopi, G. Vasileiadis, Hannah Dalgleish, donggeun tak, Juan Carlos Díaz Vélez, Armelle Jardin-Blicq, N. Zywucka, Abe Falcone, Nicola Omodei, Matthieu Renaud, German Hermann, Paul Morris, Maria Haupt, Stefan Klepser, Christopher van Eldik, Rafal Moderski, Alessandro Montanari, Amy Furniss, Sylvia Zhu, P. J. Meintjes, David Berge, Jose Andres Garcia-Gonzalez, Humberto Ibarguen Salazar, Wayne Robert Springer, Heike Prokoph, Marion Spir-Jacob, Amid Nayerhoda, Laboratoire d'Annecy de Physique des Particules (LAPP/Laboratoire d'Annecy-le-Vieux de Physique des Particules), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire d'Annecy de Physique des Particules (LAPP), Fermi-LAT, HAWC, H.E.S.S., MAGIC, and VERITAS

Subjects
Cherenkov detector, air, Cherenkov counter: water, Physics beyond the Standard Model, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, satellite, FOS: Physical sciences, IACT, Astrophysics, 01 natural sciences, GLAST, dark matter, law.invention, law, HESS, 0103 physical sciences, 010306 general physics, Cherenkov radiation, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), Annihilation, 010308 nuclear & particles physics, background, new physics, imaging, sensitivity, MAGIC, Galaxy, Automatic Keywords, annihilation, VERITAS, galaxy, Astrophysics - High Energy Astrophysical Phenomena, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], statistical, HAWC, Fermi Gamma-ray Space Telescope
Abstract

36th International Cosmic Ray Conference, ICRC2019, Madison, USA, 24 Jul 2019 - 1 Aug 2019; 9 pages (2019)., The search for Dark Matter (DM) has great potential to reveal physics beyond the Standard Model. As such, searches for evidence of DM particles are being carried out using a wide range of techniques, such as direct searches for DM particles, searches for DM produced with colliders, and indirect searches for the Standard Model annihilation products of DM. Dwarf spheroidal galaxies (dSphs) are excellent targets for indirect Dark Matter searches due to their relatively high DM content and negligible expected astrophysical background. A collaboration was formed to maximise the sensitivity of DM searches towards dSphs by combining for the first time dSph data from three imaging air Cherenkov telescope (IACT) arrays: HESS, MAGIC, and VERITAS; the Fermi-LAT satellite, and the water Cherenkov detector HAWC. Due to the diverse nature of the instruments involved, each experiment will analyse their individual datasets from multiple targets and then the results will be combined at the likelihood level. For consistency of the likelihoods across the five experiments, a common approach is used to treat the astrophysical factor (J-Factor) for each target and an agreed set of annihilation channels are considered. We also agree on a common statistical approach and treatment of instrumental systematic uncertainties. The results are presented in terms of constraints on the velocity-weighted cross section for DM self-annihilation as a function of the DM particle mass.

Published
2019
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9. Supernova Neutrinos at the DUNE Experiment

Author

Amanda Weinstein

Subjects
Physics, History, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Astrophysics, Electron, Physics::Geophysics, Computer Science Applications, Education, Supernova, Liquid argon, Deep Underground Neutrino Experiment, High Energy Physics::Experiment, Neutrino
Abstract

The Deep Underground Neutrino Experiment (DUNE) experiment, a 40-kton underground liquid argon time-projection-chamber detector, will have unique sensitivity to the electron flavor component of a core-collapse supernova neutrino burst. We present the expected capabilities of DUNE for measurements of neutrinos in the few-tens-of-MeV range relevant for supernova detection and its corresponding sensitivity to both neutrino physics and supernova astrophysics. Recent progress and some outstanding issues are highlighted.

Published
2020

10. Pulsar Wind Nebulae and Cosmic Rays: A Bedtime Story

Author

Amanda Weinstein

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Conjunction (astronomy), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy, Cosmic ray, Atomic and Molecular Physics, and Optics, Pulsar, Observatory, Astrophysics::Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics::Galaxy Astrophysics
Abstract

The role pulsar wind nebulae play in producing our locally observed cosmic ray spectrum remains murky, yet intriguing. Pulsar wind nebulae are born and evolve in conjunction with SNRs, which are favored sites of Galactic cosmic ray acceleration. As a result they frequently complicate interpretation of the gamma-ray emission seen from SNRs. However, pulsar wind nebulae may also contribute directly to the local cosmic ray spectrum, particularly the leptonic component. This paper reviews the current thinking on pulsar wind nebulae and their connection to cosmic ray production from an observational perspective. It also considers how both future technologies and new ways of analyzing existing data can help us to better address the relevant theoretical questions. A number of key points will be illustrated with recent results from the VHE (E > 100 GeV) gamma-ray observatory VERITAS., Nucl Phys B Proc Suppl, in press. Proceedings for "Cosmic Ray Origin - beyond the standard models," March 2014

Published
2014

11. VERITAS Observations of the Galactic Center

Author

Amanda Weinstein

Subjects
Physics, Range (particle radiation), WIMP, Astrophysics::High Energy Astrophysical Phenomena, Phase space, Dark matter, Galactic Center, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Radiation, Cherenkov radiation
Abstract

Weakly-interacting massive particles (WIMPS) are among the wide range of candidates for the dark matter (DM) that dominates the mass content of the universe. In some scenarios these WIMPs are self-annihilating. In regions of high dark matter density (such as our own Galactic Center) this self-annihilation is expected to produce a characteristic gamma-ray radiation signature that cuts off at the WIMP mass. Observations of these regions of high dark matter density with very-high-energy (VHE) gamma-ray telescopes can constrain a unique phase space of heavy WIMP masses. However, in the case of the Galactic Center gamma-ray emission arising from more conventional astrophysical sources complicates the interpretation of such observations. We provide an update on deep observations of the Galactic Center with VERITAS, an array of atmospheric Cherenkov telescopes sensitive to VHE gamma rays with energies between 85 GeV and 30 TeV.

Published
2017

12. The fluid database paradigm: a prototype

Author

Mojtaba Kadkhodaie Elyaderani, Cameron B Rulten, Robyn R. Lutz, T. Brantseg, Amanda Weinstein, Jarvis Haupt, and Lucy Fortson

Subjects
Metadata, Development (topology), Database, Network packet, Aggregate (data warehouse), Process (computing), Fault tolerance, computer.software_genre, Spurious relationship, computer, Throughput (business)
Abstract

The process of event-building---i.e gathering and associating data from multiple sensors or sub-detectors that arises from a common physical event---is used in many fields, including high-energy physics and gamma-ray astronomy. The problem of fault tolerance in event-building is a difficult one, and one that becomes increasingly difficult with higher data throughput rates and increasing numbers of sub-detectors. We draw on biological self-assembly models in the development of a novel event-building paradigm that treats each packet of data from an individual sensor or sub-detector as if it were a molecule in solution. Bonds (analogous to chemical bonds) are defined between data packets using metadata-based discriminants. A database, which plays the role of a beaker of solution, quasi-randomly and continually selects pairs of assemblies to test for bonds, allowing single tiles and small assemblies to aggregate into larger assemblies. During this process higher-quality associations supersede spurious ones. The database thereby becomes fluid, dynamic, and self-annealing rather than static. We will describe lessons learned from early prototypes of the fluid database as well as future directions.

Published
2017

13. Creating a high-resolution picture of Cygnus with the Cherenkov Telescope Array

Author

Amanda, Weinstein, Ester, Aliu, Sabrina, Casanova, Michael, Dyrda, Joachim, Hahn, Pratik, Majumdar, Jerome, Rodriguez, Luigi, Tibaldo, For, the CTA Consortium, DI GIROLAMO, TRISTANO, Amanda, Weinstein, Ester, Aliu, Sabrina, Casanova, DI GIROLAMO, Tristano, Michael, Dyrda, Joachim, Hahn, Pratik, Majumdar, Jerome, Rodriguez, Luigi, Tibaldo, and For, the CTA Consortium

Subjects
astro-ph.HE
Abstract

The Cygnus region hosts one of the most remarkable star-forming regions in the Milky Way. Indeed, the total mass in molecular gas of the Cygnus X complex exceeds 10 times the total mass of all other nearby star-forming regions. Surveys at all wavelengths, from radio to gamma-rays, reveal that Cygnus contains such a wealth and variety of sources---supernova remnants (SNRs), pulsars, pulsar wind nebulae (PWNe), H II regions, Wolf-Rayet binaries, OB associations, microquasars, dense molecular clouds and superbubbles---as to practically be a galaxy in microcosm. The gamma-ray observations along reveal a wealth of intriguing sources at energies between 1 GeV and tens of TeV. However, a complete understanding of the physical phenomena producing this gamma-ray emission first requires us to disentangle overlapping sources and reconcile discordant pictures at different energies. This task is made more challenging by the limited angular resolution of instruments such as the Fermi Large Area Telescope, ARGO-YBJ, and HAWC and the limited sensitivity and field of view of current imaging atmospheric Cherenkov telescopes (IACTs). The Cherenkov Telescope Array (CTA), with its improved angular resolution, large field of view, and order of magnitude gain in sensitivity over current IACTs, has the potential to finally create a coherent and well-resolved picture of the Cygnus region between a few tens of GeV and a hundred TeV. We describe a proposed strategy to study the Cygnus region using CTA data, which combines a survey of the whole region at $65^\circ < l < 85^\circ$ and $-3.5^\circ < b < 3.5^\circ $ with deeper observations of two sub-regions that host rich groups of known gamma-ray sources.

Published
2015

14. Search for the radiative decay B0→γ

Author

A. B. Breon, R. G. Jacobsen, V. B. Koptchev, S. Ahmed, D. Gamba, J. L. Ritchie, I. Kitayama, S. E. Morgan, T. B. Moore, S. Schrenk, M. Dickopp, M. Legendre, P. C. Bloom, H. K. Hadavand, E. Chen, Q. H. Guo, B. Stugu, D. Dujmic, G. Marchiori, S. H. Robertson, N. S. Knecht, V. B. Golubev, G. Therin, P. Kim, Ch Yèche, F. Bucci, Paul Kyberd, M. M. Macri, G. Kukartsev, P. F. Giraud, J. C. Dingfelder, J. W. Berryhill, S. J. Sekula, A. Jawahery, S. D. Foulkes, G. P. Taylor, Herbert Koch, Maurizio Pierini, V. Halyo, R. Capra, R. N. Cahn, Maria Roberta Monge, G. Cibinetto, Peter Elmer, G. Wagner, L. Gladney, J. Schwiening, R. Faccini, N. De Groot, F. Ferrarotto, A. J. Lankford, F. Le Diberder, A. Mihalyi, Pierluigi Paolucci, N. Danielson, F. Galeazzi, Marcella Bona, J. D. Richman, M. J.J. John, R. Aleksan, E. Paoloni, P. Spradlin, R. Contri, G. W. Morton, M. H. Schune, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, A. Roodman, T. J. Orimoto, D. Fortin, C. H. Cheng, A. Höcker, Liliana Teodorescu, X. C. Lou, J. J. Walsh, J. Marks, K. K. Gan, X. R. Chen, G. A. Cowan, S. Ricciardi, M. Lu, G. De Nardo, F. Simonetto, R. H. Schindler, Marcello Rotondo, Alexis Pompili, Tetiana Hryn'ova, A. P. Onuchin, H. U. Flaecher, A. Zghiche, A. M. Eichenbaum, C. K. Lae, M. T. Ronan, S. Otto, A. Chen, A. Ryd, R. Liu, A. Zallo, J. R. Fry, R. J. Wilson, L. M. Cremaldi, G. Rizzo, C. Lu, D. Judd, V. Lepeltier, B. A. Petersen, J. A. McKenna, F. Couderc, C. L. Brown, Bruce Schumm, F. Colecchia, R. Bartoldus, K. T. Flood, John Allison, Zongfu Yu, M. J. Charles, D. Côté, Shanhui Fan, Lijun Zhang, C. A. Heusch, P. Patteri, J. W. Lamsa, R. de Sangro, J. Brose, D. del Re, T. Pulliam, Roland Waldi, F. Ferroni, J. Schubert, Davide Piccolo, S. Saremi, M. Benayoun, S. L. Wu, W. Kozanecki, L. Del Buono, Roberto Calabrese, B. C. Shen, S. Brunet, A. Satpathy, A. Lu, A. J. Hart, L. Bosisio, A. Calcaterra, D. G. Hitlin, P. Rankin, S. Bailey, H. Marsiske, O. Hamon, J. A. Nash, M. Lo Vetere, Francesco Polci, R. Kroeger, A. W. Weidemann, C. Voci, H. L. Snoek, R. Eckmann, I. M. Peruzzi, W. H. Toki, S. Ye, T. C. Petersen, R. Ter-Antonyan, Eleonora Luppi, J. P. Lees, Te Latham, H. J. Bulten, M. Pelizaeus, Crisostomo Sciacca, D. Aston, H. Schröder, F. Bellini, S. Luitz, V. E. Ozcan, A. N. Yushkov, Yuehong Xie, D. Boutigny, J. Ocariz, Nicola Neri, A. T. Watson, D. A. Bowerman, D. C. Williams, J. M. Roney, M. K. Sullivan, E. Treadwell, T. Schalk, V. Miftakov, Y. P. Lau, Justin Albert, Paul Fraser Harrison, Mauro Morandin, M. Fritsch, S. S. Hertzbach, A. Lazzaro, D. Su, Sai-Juan Chen, T. Cuhadar-Donszelmann, M. G. Greene, A. D'Orazio, M. Chao, B. Spaan, S. Jayatilleke, Julie Malcles, V. Poireau, K. A. Ulmer, C. Hearty, A. M. Lutz, A. J.S. Smith, H. Briand, A. M. Eisner, Hui Li, M. A. Mazzoni, G. Wormser, C. Gatto, Y. Groysman, F. Blanc, C. Touramanis, Luca Lista, J. M. Thompson, M. Bruinsma, W. J. Wisniewski, A. Soha, L. Wilden, M. Piccolo, M. T. Allen, G. Lynch, E. A. Eckhart, C. Roat, A. J. Bevan, F. Muheim, James R. Wilson, M. G. Wilson, M. Steinke, D. J. Summers, M. Pripstein, A. W. Borgland, D. A. Roberts, F. E. Taylor, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, P. M. Patel, T. Schroeder, M. C. Hodgkinson, G. Grosdidier, J. E. Sundermann, Markus Cristinziani, Stephen Robert Wagner, J.H. Panetta, Mohamed H. Ahmed, G. Batignani, N. Cavallo, L. Lanceri, E. Grauges-Pous, Stéphane Plaszczynski, D. S. Best, M. L. Kocian, T. Held, K. E. Ford, M. T. Graham, T. J. Harrison, J. W. Gary, G. Benelli, E. O. Olaiya, L. M. Mir, T. R. McMahon, T. Piatenko, W. D. Hulsbergen, M. V. Purohit, S. Yang, W. Dunwoodie, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, M. C. Simani, Francesco Fabozzi, K. R. Schubert, G. Vasileiadis, R. J. Sobie, F. Anulli, A. Perazzo, C. Voena, L. Vitale, S. Passaggio, F. X. Yumiceva, M. Mandelkern, U. Langenegger, G. W. Brandenburg, H. Kagan, W. A. Wenzel, J. Va'vra, F. Martinez-Vidal, Dominik Müller, D. P. Stoker, Nicolas Berger, T. Glanzman, Matteo Rama, M. A. Saeed, N. R. Barlow, F. Palombo, B. Franek, M. Wittgen, Vivek Sharma, S. Dittongo, N. A. Roe, G. P. Dubois-Felsmann, R. C. Field, F. Salvatore, M. Carpinelli, Lydia Roos, G. Finocchiaro, V. Luth, G. Blaylock, M. Morganti, S. Prell, G. Eigen, F. Safai Tehrani, R. F. Schwitters, Q. K. Wong, J.J. Reidy, S. M. Spanier, D. B. MacFarlane, S. Playfer, James D. Olsen, C. P. O'Grady, R. R. Kofler, C. T. Potter, M. Krishnamurthy, A. V. Gritsan, Mario Giorgi, Jie Zhang, R. Claus, Akram Khan, James H Cochran, Matteo Negrini, J. G. Smith, R. S. Dubitzky, J. Stelzer, R. Godang, M. S. Alam, B. Lewandowski, A. Snyder, M. S. Gill, L. T. Kerth, M. A. Baak, M. Pioppi, D. E. Wagoner, A. Soffer, W. O. Ruddick, J. M. LoSecco, A. V. Telnov, H. M. Lacker, H. L. Lynch, S. Morganti, Sridhara Dasu, K. Koeneke, Gabriele Simi, Roberto Covarelli, R. W. Kadel, B. Cheng, V. E. Blinov, A. Palano, M. P. Kelly, B. T. Meadows, F. Gallo, G. Raven, C. L. Davis, J. I. 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Cormack, Denis Bernard, J. A. Kadyk, Chunhui Chen, D. Dong, E. Won, Y. S. Zhu, J. R. Gaillard, K. Paick, A. Dorigo, JunJie Wu, M. A. Mazur, R. J. Parry, E. Di Marco, D. H. Wright, C. Patrignani, A. Cunha, V. Tisserand, W. Roethel, L. Piemontese, E. Gabathuler, W. R. Innes, F. C. Porter, S. Bettarini, G. W. 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V, Tisserand, V, Zghiche, A, Grauges Pous, E, Palano, A, Pompili, A, Chen, J, Qi, N, Rong, G, Wang, P, Zhu, Y, Eigen, G, Ofte, I, Stugu, B, Abrams, G, Borgland, A, Breon, A, Brown, D, Button Shafer, J, Cahn, R, Charles, E, Day, C, Gill, M, Gritsan, A, Groysman, Y, Jacobsen, R, Kadel, R, Kadyk, J, Kerth, L, Kolomensky, Y, Kukartsev, G, Lynch, G, Mir, L, Oddone, P, Orimoto, T, Pripstein, M, Roe, N, Ronan, M, Wenzel, W, Barrett, M, Ford, K, Harrison, T, Hart, A, Hawkes, C, Morgan, S, Watson, A, Fritsch, M, Goetzen, K, Held, T, Koch, H, Lewandowski, B, Pelizaeus, M, Schroeder, T, Steinke, M, Boyd, J, Chevalier, N, Cottingham, W, Kelly, M, Latham, T, Wilson, F, Cuhadar Donszelmann, T, Hearty, C, Knecht, N, Mattison, T, Mckenna, J, Thiessen, D, Khan, A, Kyberd, P, Teodorescu, L, Blinov, A, Blinov, V, Druzhinin, V, Golubev, V, Ivanchenko, V, Kravchenko, E, Onuchin, A, Serednyakov, S, Skovpen, Y, Solodov, E, Yushkov, A, Best, D, Bruinsma, M, Chao, M, Eschrich, I, Kirkby, D, Lankford, A, Mandelkern, M, Mommsen, R, Roethel, W, Stoker, D, Buchanan, C, Hartfiel, B, Weinstein, A, Foulkes, S, Gary, J, Long, O, Shen, B, Wang, K, del Re, D, Hadavand, H, Hill, E, Macfarlane, D, Paar, H, Rahatlou, S, Sharma, V, Berryhill, J, Campagnari, C, Cunha, A, Dahmes, B, Hong, T, Lu, A, Mazur, M, Richman, J, Verkerke, W, Beck, T, Eisner, A, Heusch, C, Kroseberg, J, Lockman, W, Nesom, G, Schalk, T, Schumm, B, Seiden, A, Spradlin, P, Williams, D, Wilson, M, Albert, J, Chen, E, Dubois Felsmann, G, Dvoretskii, A, Hitlin, D, Narsky, I, Piatenko, T, Porter, F, Ryd, A, Samuel, A, Yang, S, Jayatilleke, S, Mancinelli, G, Meadows, B, Sokoloff, M, Blanc, F, Bloom, P, Chen, S, Ford, W, Nauenberg, U, Olivas, A, Rankin, P, Ruddick, W, Smith, J, Ulmer, K, Zhang, J, Zhang, L, Chen, A, Eckhart, E, Harton, J, Soffer, A, Toki, W, Wilson, R, Zeng, Q, Spaan, B, Altenburg, D, Brandt, T, Brose, J, Dickopp, M, Feltresi, E, Hauke, A, Lacker, H, Nogowski, R, Otto, S, Petzold, A, Schubert, J, Schubert, K, Schwierz, R, Sundermann, J, Bernard, D, Bonneaud, G, Grenier, P, Schrenk, S, Thiebaux, C, Vasileiadis, G, Verderi, M, Bard, D, Clark, P, Muheim, F, Playfer, S, Xie, Y, Andreotti, M, Azzolini, V, Bettoni, D, Bozzi, C, Calabrese, R, Cibinetto, G, Luppi, E, Negrini, M, Piemontese, L, Sarti, A, Treadwell, E, Anulli, F, Baldini Ferroli, R, Calcaterra, A, de Sangro, R, Finocchiaro, G, Patteri, P, Peruzzi, I, Piccolo, M, Zallo, A, Buzzo, A, Capra, R, Contri, R, Crosetti, G, Lo Vetere, M, Macri, M, Monge, M, Passaggio, S, Patrignani, C, Robutti, E, Santroni, A, Tosi, S, Bailey, S, Brandenburg, G, Chaisanguanthum, K, Morii, M, Won, E, Dubitzky, R, Langenegger, U, Marks, J, Uwer, U, Bhimji, W, Bowerman, D, Dauncey, P, Egede, U, Gaillard, J, Morton, G, Nash, J, Nikolich, M, Taylor, G, Charles, M, Grenier, G, Mallik, U, Cochran, J, Crawley, H, Lamsa, J, Meyer, W, Prell, S, Rosenberg, E, Rubin, A, Yi, J, Biasini, M, Covarelli, R, Pioppi, M, Arnaud, N, Davier, M, Giroux, X, Grosdidier, G, Hocker, A, Le Diberder, F, Lepeltier, V, Lutz, A, Petersen, T, Plaszczynski, S, Schune, M, Wormser, G, Cheng, C, Lange, D, Simani, M, Wright, D, Bevan, A, Chavez, C, Coleman, J, Forster, I, Fry, J, Gabathuler, E, Gamet, R, Hutchcroft, D, Parry, R, Payne, D, Touramanis, C, Cormack, C, Di Lodovico, F, Brown, C, Cowan, G, Flack, R, Flaecher, H, Green, M, Jackson, P, Mcmahon, T, Ricciardi, S, Salvatore, F, Winter, M, Davis, C, Allison, J, Barlow, N, Barlow, R, Hodgkinson, M, Lafferty, G, Williams, J, Chen, C, Farbin, A, Hulsbergen, W, Jawahery, A, Kovalskyi, D, Lae, C, Lillard, V, Roberts, D, Blaylock, G, Dallapiccola, C, Hertzbach, S, Kofler, R, Koptchev, V, Moore, T, Saremi, S, Staengle, H, Willocq, S, Cowan, R, Koeneke, K, Sciolla, G, Sekula, S, Taylor, F, Yamamoto, R, Patel, P, Robertson, S, Lazzaro, A, Lombardo, V, Palombo, F, Bauer, J, Cremaldi, L, Eschenburg, V, Godang, R, Kroeger, R, Reidy, J, Sanders, D, Summers, D, Zhao, H, Brunet, S, Cote, D, Taras, P, Nicholson, H, Cavallo, N, Fabozzi, F, 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Neal, H

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Photon, Annihilation, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Detector, BABAR detector, 01 natural sciences, Particle identification, HEP, Nuclear physics, 0103 physical sciences, BaBar, CP violation, 010306 general physics, Storage ring
Abstract

We perform a search for the exclusive radiative decay B0→γ, which is dominated by b̄d annihilation, in a sample of 124×106 BB̄ events collected with the BABAR detector at the PEP-II asymmetric-energy e+e- storage ring at SLAC. No significant signal is seen. We set an upper limit on the branching fraction of B(B0→γ)

Published
2016

15. Multiband variability studies and novel broadband SED modeling of Mrk 501 in 2009

Author

K. Nishijima, J. L. Richards, Stefano Covino, G. Piner, D. Dominis Prester, U. Menzel, A. Flinders, D. Tescaro, Louis Antonelli, D. Galindo, Aaron Dominguez, S. Schröder, Elena G. Larionova, Kari Nilsson, Paul S. Smith, A. McCann, T. S. Grishina, Wen Ping Chen, M. Will, Pratik Majumdar, J. E. Ward, Daniela Dorner, Dariusz Gora, P. Moriarty, C. Rulten, Soebur Razzaque, D. Garrido Terrats, K. Frantzen, Joseph Moody, Wystan Benbow, G. Hughes, K. Ragan, Ralph Bird, L. Perri, M. Gaug, T. Sakamoto, Valeri M. Larionov, Elina Lindfors, G. H. Sembroski, Daniel Mazin, Ievgen Vovk, A. Hahn, M. Hütten, N. H. Park, Alexander B. Pushkarev, G. Maccaferri, Thomas Bretz, P. Wilcox, P. Kar, D. Nakajima, R. Zanin, J. Herrera, Wei Cui, Amanda Weinstein, J. Palacio, P. G. Prada Moroni, Frank Krennrich, Matthew L. Lister, A. Berti, A. Cesarini, M. Kertzman, A. La Barbera, Walter Max-Moerbeck, E. Colombo, M. Villata, M. P. Connolly, Adrian Biland, D. S. Hanna, Ana Babić, D. Eisenacher Glawion, Juan Abel Barrio, John L. Quinn, M. Capalbi, Koji Noda, Arka Chatterjee, Elisa Bernardini, A. Sillanpää, Adrian Rovero, Antonio Stamerra, J. V. Tucci, M. Nievas Rosillo, M. Palatiello, L. V. Larionova, S. N. Shore, R. Mukherjee, M. J. Lang, Daniel Nieto, M. I. Martínez, S. Bonnefoy, J. Kushida, P. Giammaria, P. Bangale, Wolfgang Rhode, Gernot Maier, G. Pedaletti, L. O. Takalo, Margo F. Aller, Jose Luis Contreras, Andrei Berdyugin, J. A. Zensus, E. Roache, V. Verguilov, D. Fidalgo, C. Pace, Thomas P. Krichbaum, Francesco Dazzi, Juan Cortina, M. Engelkemeier, G. H. Gillanders, A. Carraminyana, S. P. Wakely, Mosè Mariotti, J. Rico, A. Fernández-Barral, R. Clavero, J. Becerra González, A.-K. Overkemping, S. O. Kurtanidze, Sabrina Einecke, Abraham D. Falcone, A. González Muñoz, Evgenia N. Kopatskaya, Lars Fuhrmann, Nikola Godinovic, Benito Marcote, Karlen Shahinyan, Takashi Saito, W. Bednarek, C. Schultz, Marcos Santander, Fabrizio Tavecchio, J. Rodriguez Garcia, E. Pueschel, Ll. Font, A. C. Sadun, A. Popkow, J. Grube, V. Bugaev, Anthony C. S. Readhead, R. Ligustri, A. Archer, I. Snidaric, Yusuke Konno, P. Calcidese, M. Strzys, A. Pichel, Saverio Lombardi, B. De Lotto, Markus Garczarczyk, N. Kelley-Hoskins, J. Tyler, Ann E. Wehrle, B. Banerjee, S. Buson, D. Hadasch, N. Otte, Maria G. Nikolashvili, Gordon T. Richards, L. Nogués, B. Biasuzzi, Juri Poutanen, U. Barres de Almeida, J. P. Finley, K. Mallot, S. Paiano, Marcello Giroletti, I. Nestoras, A. De Angelis, A. Treves, Vitaly Neustroev, X. Paredes-Fortuny, T. B. Humensky, R. A. Ong, Karl Mannheim, J. H. Buckley, Yu. A. Kovalev, R. J. García López, H. Fleischhack, G. N. Kimeridze, I. Sadeh, David A. Williams, Y. Mori, M. V. Fonseca, W. Idec, Matthias Kadler, Yuri Y. Kovalev, Stefano Ansoldi, Riccardo Paoletti, K. Kodani, J. P. Norris, O. M. Kurtanidze, N. V. Efimova, Y. Hanabata, Arkady A. Arkharov, Anne Lähteenmäki, Abelardo Moralejo, G. Maneva, Masahiro Teshima, A. C. Zook, Dario Hrupec, P. Antoranz, B. Zitzer, Hugh Dickinson, R. A. Chigladze, M. Peresano, Ekaterina Koptelova, S. Archambault, M. A. Lopez, T. Steinbring, P. Temnikov, P. Leto, Massimo Persic, J. M. Paredes, Hugh D. Aller, F. Borracci, S. O'Brien, T. Surić, I. Telezhinsky, I. Reichardt, Jamie Holder, G. Vanzo, R. Pearson, Julia Thaele, G. Bonnoli, Mark Gurwell, Eduardo Ros, Andrea Orlati, S. Griffin, L. A. Sigua, Diego F. Torres, Alessandro Carosi, Ruben Lopez-Coto, Maria Krause, Y. Yatsu, A. Wilhelm, Jose Miguel Miranda, Anushka Udara Abeysekara, T. Schweizer, P. Cassaro, Razmik Mirzoyan, E. Moretti, Damir Lelas, Francesco Longo, V. Fallah Ramazani, P. Kaaret, Dorota Sobczyńska, L. Maraschi, Kirill Sokolovsky, Tomislav Terzić, Lucy Fortson, E. de Ona Wilhelmi, Julian Sitarek, C. Fruck, T. Toyama, Ivica Puljak, Max Ludwig Ahnen, David Kieda, F. Di Pierro, Pierre Colin, M. Buchovecky, Oscar Blanch, P. Da Vela, A. Niedzwiecki, Emmanouil Angelakis, M. Doert, M. H. Wu, Ivan S. Troitsky, C. Pagani, David Paneque, Q. Feng, Vladimir A. Hagen-Thorn, E. De la Fuente, E. Prandini, C. M. Raiteri, L. Carrasco, D. Guberman, Jeremy S. Perkins, Martin Pohl, Marina Manganaro, H. A. Krimm, Merja Tornikoski, Konstancja Satalecka, Michele Doro, Dmitry A. Blinov, M. Perri, J. Hose, D. Elsaesser, Daria A. Morozova, P. T. Reynolds, M. Hayashida, Marc Ribó, Hidetoshi Kubo, M. Makariev, Swiss Federal Institute of Technology Zurich, University of Udine, INAF National Institute for Astrophysics, University of Siena, University of Rijeka, Saha Institute of Nuclear Physics, Max Planck Institute for Physics, Complutense University, University of La Laguna, University of Łódź, German Electron Synchrotron, Autonomous University of Barcelona, University of Würzburg, University of Padova, Institute of Space Studies of Catalonia, Dortmund University, Finnish MAGIC Consortium, University of Barcelona, The University of Tokyo, Bulgarian Academy of Sciences, Osservatorio Astronomicodi Roma, University of Pisa, ICREA, University of Maryland, College Park, McGill University, Washington University St. Louis, Harvard University, University College Dublin, University of California Los Angeles, National University of Ireland, Galway, Purdue University, Iowa State University, Pennsylvania State University, University of Utah, University of Minnesota Twin Cities, Adler Planetarium and Astronomy Museum, University of Delaware, Columbia University, University of Iowa, DePauw University, Georgia Institute of Technology, University of Chicago, NASA Goddard Space Flight Center, Universidad de Buenos Aires, Cork Institute of Technology, University of California Santa Cruz, Argonne National Laboratory, University of Johannesburg, University of Michigan, Ann Arbor, St. Petersburg State University, RAS - Pulkovo Astronomical Observatory, Circolo Astrofili Talmassons, Osservatorio Astrofisico della Regione Autonoma Valle d'Aosta, Georgian National Academy of Sciences, National Central University, Aoyama Gakuin University, University of Colorado Denver, Brigham Young University, Tokyo Institute of Technology, Instituto Nacional de Astrofisica Optica y Electronica, Universidad de Guadalajara, University of Denver, University of Arizona, Space Science Institute, Pomona College, University of Leicester, ASI Science Data Center, University of Trento, RAS - P.N. Lebedev Physics Institute, Max Planck Institute for Radio Astronomy, Whittier College, Metsähovi Radio Observatory, INAF Istituto di Radioastronomia, Osservatorio Astrofisico di Catania, California Institute of Technology, Department of Electronics and Nanoengineering, Aalto-yliopisto, Aalto University, Ahnen, M. L., Ansoldi, S., Antonelli, L. A., Antoranz, P., Babic, A., Banerjee, B., Bangale, P., Barres De Almeida, U., Barrio, J. A., Becerra González, J., Bednarek, W., Bernardini, E., Berti, Alessio, Biasuzzi, B., Biland, A., Blanch, O., Bonnefoy, S., Bonnoli, G., Borracci, F., Bretz, T., Buson, S., Carosi, A., Chatterjee, A., Clavero, R., Colin, P., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., De Oña Wilhelmi, E., Di Pierro, F., Doert, M., Domã­nguez, A., Dominis Prester, D., Dorner, D., Doro, M., Einecke, S., Eisenacher Glawion, D., Elsaesser, D., Engelkemeier, M., Fallah Ramazani, V., Fernández Barral, A., Fidalgo, D., Fonseca, M. V., Font, L., Frantzen, K., Fruck, C., Galindo, D., García López, R. J., Garczarczyk, M., Garrido Terrats, D., Gaug, M., Giammaria, P., Godinoviä , N., González Muñoz, A., Gora, D., Guberman, D., Hadasch, D., Hahn, A., Hanabata, Y., Hayashida, M., Herrera, J., Hose, J., Hrupec, D., Hughes, G., Idec, W., Kodani, K., Konno, Y., Kubo, H., Kushida, J., La Barbera, A., Lelas, D., Lindfors, E., Lombardi, S., Longo, Francesco, Lã³pez, M., López Coto, R., Majumdar, P., Makariev, M., Mallot, K., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Marcote, B., Mariotti, M., Martã­nez, M., Mazin, D., Menzel, U., Miranda, J. M., Mirzoyan, R., Moralejo, A., Moretti, E., Nakajima, D., Neustroev, V., Niedzwiecki, A., Nievas Rosillo, M., Nilsson, K., Nishijima, K., Noda, K., Noguã©s, L., Overkemping, A., Paiano, S., Palacio, J., Palatiello, Michele, Paneque, D., Paoletti, R., Paredes, J. M., Paredes Fortuny, X., Pedaletti, G., Peresano, M., Perri, L., Persic, M., Poutanen, J., Prada Moroni, P. G., Prandini, E., Puljak, I., Reichardt, I., Rhode, W., Ribã³, M., Rico, J., Rodriguez Garcia, J., Saito, T., Satalecka, K., Schrã¶der, S., Schultz, C., Schweizer, T., Shore, S. N., Sillanpã¤ã¤, A., Sitarek, J., Snidaric, I., Sobczynska, D., Stamerra, A., Steinbring, T., Strzys, M., Suriä , T., Takalo, L., Tavecchio, F., Temnikov, P., Terziä , T., Tescaro, D., Teshima, M., Thaele, J., Torres, D. F., Toyama, T., Treves, A., Vanzo, G., Verguilov, V., Vovk, I., Ward, J. E., Will, M., Wu, M. H., Zanin, R., Abeysekara, A. U., Archambault, S., Archer, A., Benbow, W., Bird, R., Buchovecky, M., Buckley, J. H., Bugaev, V., Connolly, M. P., Cui, W., Dickinson, H. J., Falcone, A., Feng, Q., Finley, J. P., Fleischhack, H., Flinders, A., Fortson, L., Gillanders, G. H., Griffin, S., Grube, J., Hã¼tten, M., Hanna, D., Holder, J., Humensky, T. B., Kaaret, P., Kar, P., Kelley Hoskins, N., Kertzman, M., Kieda, D., Krause, M., Krennrich, F., Lang, M. J., Maier, G., Mccann, A., Moriarty, P., Mukherjee, R., Nieto, D., O'Brien, S., Ong, R. A., Otte, N., Park, N., Perkins, J., Pichel, A., Pohl, M., Popkow, A., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Richards, G. T., Roache, E., Rovero, A. C., Rulten, C., Sadeh, I., Santander, M., Sembroski, G. H., Shahinyan, K., Telezhinsky, I., Tucci, J. V., Tyler, J., Wakely, S. P., Weinstein, A., Wilcox, P., Wilhelm, A., Williams, D. A., Zitzer, B., Razzaque, S., Villata, M., Raiteri, C. M., Aller, H. D., Aller, M. F., Larionov, V. M., Arkharov, A. A., Blinov, D. A., Efimova, N. V., Grishina, T. S., Hagen Thorn, V. A., Kopatskaya, E. N., Larionova, L. V., Larionova, E. G., Morozova, D. A., Troitsky, I. S., Ligustri, R., Calcidese, P., Berdyugin, A., Kurtanidze, O. M., Nikolashvili, M. G., Kimeridze, G. N., Sigua, L. A., Kurtanidze, S. O., Chigladze, R. A., Chen, W. P., Koptelova, E., Sakamoto, T., Sadun, A. C., Moody, J. W., Pace, C., Pearson, R., Yatsu, Y., Mori, Y., Carraminyana, A., Carrasco, L., De La Fuente, E., Norris, J. P., Smith, P. S., Wehrle, A., Gurwell, M. A., Zook, A., Pagani, C., Perri, M., Capalbi, M., Cesarini, A., Krimm, H. A., Kovalev, Y. Y., Kovalev, Y. u. A., Ros, E., Pushkarev, A. B., Lister, M. L., Sokolovsky, K. V., Kadler, M., Piner, G., Lã¤hteenmã¤ki, A., Tornikoski, M., Angelakis, E., Krichbaum, T. P., Nestoras, I., Fuhrmann, L., Zensus, J. A., Cassaro, P., Orlati, A., Maccaferri, G., Leto, P., Giroletti, M., Richards, J. L., Max Moerbeck, W., and Readhead, A. C. S.

Subjects
extragalactic background light, multiwavelength observations, Astrophysics::High Energy Astrophysical Phenomena, bl-lacertae objects, Galaxies: BL Lacertae objects: individual: Markarian 501, Methods: data analysis, observational, Polarization, spectral energy-distribution, Flux, FOS: Physical sciences, Astrophysics, 01 natural sciences, law.invention, individual: Markarian 501 [BL Lacertae objects], law, Coincident, 0103 physical sciences, ddc:530, MAGIC (telescope), crab-nebula, Blazar, data analysis [Methods], 010303 astronomy & astrophysics, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), tev blazars, 010308 nuclear & particles physics, stochastic acceleration, telescope observations, Institut für Physik und Astronomie, Astronomy and Astrophysics, Astronomy and Astrophysic, gamma-ray emission, methods: data analysis, BL Lacertae objects: individual: Markarian 501, Synchrotron, data analysi [Methods], Space and Planetary Science, x-ray, ddc:520, Electrónica, Física nuclear, Electricidad, Degeneracy (mathematics), Astrophysics - High Energy Astrophysical Phenomena, Flare, BL Lac object
Abstract

Astronomy and astrophysics 603, A31 (2017). doi:10.1051/0004-6361/201629540, We present an extensive study of the BL Lac object Mrk 501 based on a data set collected during the multi-instrument campaign spanning from 2009 March 15 to 2009 August 1, which includes, among other instruments, MAGIC, VERITAS, Whipple 10 m, and Fermi-LAT to cover the γ-ray range from 0.1 GeV to 20 TeV; RXTE and Swift to cover wavelengths from UV tohard X-rays; and GASP-WEBT, which provides coverage of radio and optical wavelengths. Optical polarization measurements were provided for a fraction of the campaign by the Steward and St. Petersburg observatories. We evaluate the variability of the source and interband correlations, the γ-ray flaring activity occurring in May 2009, and interpret the results within two synchrotron self-Compton (SSC) scenarios. Aims. The multiband variability observed during the full campaign is addressed in terms of the fractional variability, and the possible correlations are studied by calculating the discrete correlation function for each pair of energy bands where the significance was evaluated with dedicated Monte Carlo simulations. The space of SSC model parameters is probed following a dedicated grid-scan strategy, allowing for a wide range of models to be tested and offering a study of the degeneracy of model-to-data agreement in the individual model parameters, hence providing a less biased interpretation than the “single-curve SSC model adjustment” typically reported in the literature. Methods. We find an increase in the fractional variability with energy, while no significant interband correlations of flux changes are found on the basis of the acquired data set. The SSC model grid-scan shows that the flaring activity around May 22 cannot be modeled adequately with a one-zone SSC scenario (using an electron energy distribution with two breaks), while it can be suitably described within a two (independent) zone SSC scenario. Here, one zone is responsible for the quiescent emission from the averaged 4.5-month observing period, while the other one, which is spatially separated from the first, dominates the flaring emission occurring at X-rays and very-high-energy (>100 GeV, VHE) γ rays. The flaring activity from May 1, which coincides with a rotation of the electric vector polarization angle (EVPA), cannot be satisfactorily reproduced by either a one-zone or a two-independent-zone SSC model, yet this is partially affected by the lack of strictly simultaneous observations and the presence of large flux changes on sub-hour timescales (detected at VHE γ rays). Results. The higher variability in the VHE emission and lack of correlation with the X-ray emission indicate that, at least during the 4.5-month observing campaign in 2009, the highest energy (and most variable) electrons that are responsible for the VHE γ rays do not make a dominant contribution to the ~1 keV emission. Alternatively, there could be a very variable component contributing to the VHE γ-ray emission in addition to that coming from the SSC scenario. The studies with our dedicated SSC grid-scan show that there is some degeneracy in both the one-zone and the two-zone SSC scenarios probed, with several combinations of model parameters yielding a similar model-to-data agreement, and some parameters better constrained than others. The observed γ-ray flaring activity, with the EVPA rotation coincident with the first γ-ray flare, resembles those reported previously for low frequency peaked blazars, hence suggesting that there are many similarities in the flaring mechanisms of blazars with different jet properties., Published by EDP Sciences, Les Ulis

Published
2016
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16. Results from the first two years of VERITAS observations

Author

F. Krennrich, Wystan Benbow, J. P. Finley, R. G. Wagner, M. McCutcheon, M. Schroedter, C. M. Hui, Simon P. Swordy, Gernot Maier, R. Guenette, M. Beilicke, D. S. Hanna, Lucy Fortson, K. Ragan, S. P. Wakely, Geza Gyuk, Daniel Gall, D. Boltuch, R. A. Ong, N. Karlsson, Amanda Weinstein, Stephanie Wissel, L. Ciupik, G. Finnegan, A. W. Smith, C. Duke, Thomas Brian Humensky, E. Roache, J. S. Perkins, P. Kaaret, A. Cesarini, John L. Quinn, S. M. Bradbury, Manuel A. Bautista, D. Pandel, Martin Pohl, G. H. Sembroski, T. Weisgarber, D. Steele, and H. J. Rose

Subjects
Physics, Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Dark matter, Astrophysics::Instrumentation and Methods for Astrophysics, Gamma ray, Astronomy, Cosmic ray, Supersymmetry, Astrophysics, Cherenkov Telescope Array, Particle detector, Astrophysical jet, Observatory, Instrumentation
Abstract

The VERITAS observatory is an imaging atmospheric Cherenkov telescope array located in southern Arizona and covers an energy range between 100 GeV and 30 TeV. The VERITAS collaboration pursues a rigorous observing program that targets a range of key science objectives in astrophysics and particle physics; the understanding of the origin of cosmic rays, the search for supersymmetric dark matter self-annihilation, illuminating the connection between black holes and relativistic jets and constraints to the cosmological diffuse infrared background. We provide a summary of results from the first two years of observations with the full 4-telecope array reported at RICAP09.

Published
2011

17. First results from VERITAS

Author

M. K. Daniel, F. Krennrich, A. Syson, L. Ciupik, S. P. Wakely, Abraham D. Falcone, F. Pizlo, G. H. Sembroski, Daniel Gall, R. A. Ong, H. Manseri, A. McCann, B. Zitzer, D. J. Fegan, S. J. Fegan, D. Steele, J. E. Ward, S. LeBohec, A. Cesarini, J. Hall, Y. C. K. Chow, S. M. Bradbury, Simon P. Swordy, M. Kertzman, John L. Quinn, D. Pandel, Martin Pohl, Henric Krawczynski, K. G. Gibbs, O. Celik, R. J. White, John Toner, J. S. Perkins, Yousaf M. Butt, V. V. Vassiliev, Pierre Colin, V. Bugaev, V. A. Acciari, S. B. Hughes, G. Blaylock, R. Guenette, G. H. Gillanders, Jacek Niemiec, H. M. Badran, R. G. Wagner, P. T. Reynolds, T. Nagai, P. A. Ogden, E. Hays, R. Amini, Geza Gyuk, O. J. Glidewell, D. Horan, Paul Dowkontt, Tulun Ergin, Reshmi Mukherjee, J. Millis, P. Moriarty, P. Fortin, H. J. Rose, Wei Cui, C. M. Hui, A. Konopelko, K. Lee, D. S. Hanna, L. Valcarcel, Lucy Fortson, Matthew Wood, C. Dowdall, M. McCutcheon, A. Imran, John Kildea, J. H. Buckley, M. J. Lang, J. P. Finley, C. Duke, A. W. Smith, E. Roache, T. C. Weekes, Stephanie Wissel, Amanda Weinstein, P. Cogan, Thomas Brian Humensky, K. Ragan, Karen Byrum, M. Schroedter, David Kieda, David A. Williams, J. Grube, Jamie Holder, G. E. Kenny, and P. Kaaret

Subjects
Physics, Nuclear and High Energy Physics, Active galactic nucleus, Sky, media_common.quotation_subject, Astronomy, Gamma-ray astronomy, Astrophysics, Blazar, Instrumentation, Galaxy, Cherenkov radiation, media_common
Abstract

VERITAS is an array of four, 12-m-diameter, Cherenkov telescopes, designed to explore the very-high-energy gamma-ray sky in the energy band between 100 GeV and 50 TeV. Its construction and commissioning have occurred over the past two years and the array has been taking scientific data with three or more telescopes since November 2006. We present results from observations made with VERITAS during the past observing season, including new results on the distant blazar 1ES 1218 + 304 , the active galaxy M87 and the high-mass X-ray binary system LS I + 61 303. We also describe the plans in place for the coming observing seasons.

Published
2008

18. Testing a Novel Self-Assembling Data Paradigm in the Context of IACT Data

Author

Amanda Weinstein, T. Brantseg, John L. Quinn, Robyn R. Lutz, Mojtaba Kakhodaie Elyaderani, Jarvis Haupt, Lucy Fortson, and Cameron B Rulten

Subjects
High Energy Astrophysical Phenomena (astro-ph.HE), Network packet, Event (computing), Distributed computing, Aggregate (data warehouse), Process (computing), FOS: Physical sciences, Fault tolerance, Context (language use), High Energy Physics - Experiment, Metadata, High Energy Physics - Experiment (hep-ex), Physics - Data Analysis, Statistics and Probability, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics (astro-ph.IM), Throughput (business), Data Analysis, Statistics and Probability (physics.data-an)
Abstract

The process of gathering and associating data from multiple sensors or sub-detectors due to a common physical event (the process of event-building) is used in many fields, including high-energy physics and $\gamma$-ray astronomy. Fault tolerance in event-building is a challenging problem that increases in difficulty with higher data throughput rates and increasing numbers of sub-detectors. We draw on biological self-assembly models in the development of a novel event-building paradigm that treats each packet of data from an individual sensor or sub-detector as if it were a molecule in solution. Just as molecules are capable of forming chemical bonds, "bonds" can be defined between data packets using metadata-based discriminants. A database -- which plays the role of a beaker of solution -- continually selects pairs of assemblies at random to test for bonds, which allows single packets and small assemblies to aggregate into larger assemblies. During this process higher-quality associations supersede spurious ones. The database thereby becomes fluid, dynamic, and self-correcting rather than static. We will describe tests of the self-assembly paradigm using our first fluid database prototype and data from the VERITAS $\gamma$-ray telescope., Comment: In Proceedings of the 34th International Cosmic Ray Conference (ICRC2015), The Hague, The Netherlands

Published
2015

19. Simulations of a Distributed Intelligent Array Trigger for the Cherenkov Telescope Array

Author

Frank Krennrich, Amanda Weinstein, and Hugh Dickinson

Subjects
Discriminator, Pixel, business.industry, Computer science, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Cosmic ray, Field of view, Cherenkov Telescope Array, Sample (graphics), law.invention, Telescope, law, business, Parallax, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Computer hardware
Abstract

It is anticipated that the forthcoming Cherenkov Telescope Array (CTA) will include a number of medium-sized telescopes that are constructed using a dual-mirror Schwarzschild-Couder configuration. These telescopes will sample a wide ($8^{\circ}$) field of view using a densely pixelated camera comprising over $10^{4}$ individual readout channels. A readout frequency congruent with the expected single-telescope trigger rates would result in substantial data rates. To ameliorate these data rates, a novel, hardware-level Distributed Intelligent Array Trigger (DIAT) is envisioned. A copy of the DIAT operates autonomously at each telescope and uses reduced metadata from a limited subset of nearby telescopes to veto events prior to camera readout. We present the results of Monte-Carlo simulations that evaluate the efficacy of a "Parallax width" discriminator that can be used by the DIAT to efficiently distinguish between genuine gamma-ray initiated events and unwanted background events that are initiated by hadronic cosmic rays., 8 pages, 17 figures. In Proceedings of the 34th International Cosmic Ray Conference (ICRC2015), The Hague, The Netherlands. All CTA contributions at arXiv:1508.05894

Published
2015

20. The Cygnus region of the galaxy: A VERITAS perspective

Author

Amanda Weinstein

Subjects
Physics, Astrophysics::High Energy Astrophysical Phenomena, QC1-999, Astronomy, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Galaxy, Latitude, Supernova, Star cluster, Pulsar, Observatory, Longitude, Astrophysics::Galaxy Astrophysics
Abstract

The Cygnus-X star-forming region ("Cygnus") is the richest star-forming region within 2 kpc of Earth and is home to a wealth of potential cosmic ray accelerators, including supernova remnants, massive star clusters, and pulsar wind nebulae. Over the past five years, discoveries by several gamma-ray observatories sensitive in different energy bands, including the identification by Fermi-LAT of a potential cocoon of freshly accelerated cosmic rays, have pinpointed this region as a unique laboratory for studying the early phases of the cosmic ray life cycle. From 2007 to 2009 VERITAS, a very high energy (VHE; E > 100 GeV) observatory in southern Arizona, undertook an extensive survey of the Cygnus region from 67 to 82 degrees Galactic longitude and from − 1t o 4 degrees in Galactic latitude. In the years since, VERITAS has continued to accumulate data at specific locations within the survey region. We will review the discoveries and insights that this rich dataset has already provided. We will also consider the key role that we expect these data to play in interpreting the complex multiwavelength picture we have of the Cygnus region, particularly in the vicinity of the Cygnus cocoon. As part of this discussion we will summarize ongoing studies of VERITAS data in the Cygnus region, including the development of new data analysis techniques that dramatically increase VERITAS' sensitivity to sources on scales larger than a square degree.

Published
2015

21. The On-Site Analysis of the Cherenkov Telescope Array

Author

Bulgarelli, Andrea, Fioretti, Valentina, Lombardi, Saverio, Tosti, Gino, Bergamaschi, Sonia, Beneventano, Domenico, Lamanna, Giovanni, Jacquemier, Jean, Kosack, Karl, Antonelli, Lucio Angelo, Boisson, Catherine, Borkowski, Jerzy, Zoli, Andrea, Buson, Sara, Carosi, Alessandro, Conforti, Vito, Colomé, Pep, de los Reyes, Raquel, Dumm, Jon, Evans, Phil, Fortson, Lucy, Fuessling, Matthias, Gotz, Diego, Aboudan, Alessio, Graciani, Ricardo, Gianotti, Fulvio, Grandi, Paola, Hinton, Jim, Humensky, Brian, Inoue, Susumu, Knödlseder, Jürgen, Flour, Thierry Le, Lindemann, Rico, Malaguti, Giuseppe, Rodríguez-Vázquez, Juan José, Markoff, Sera, Marisaldi, Martino, Neyroud, Nadine, Nicastro, Luciano, Ohm, Stefan, Osborne, Julian, Oya, Igor, Rodriguez, Jerome, Rosen, Simon, Ribo, Marc, De Cesare, Giovanni, Tacchini, Alessandro, Schüssler, Fabian, Stolarczyk, Thierry, Torresi, Eleonora, Testa, Vincenzo, Wegner, Peter, Consortium, Amanda Weinstein, Cherenkov Telescope Array Consortium, De Rosa, Adriano, Maier, Gernot, Lyard, Etienne, Bastieri, Denis, Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and CTA

Subjects
Cherenkov Telescope Array, Real-time computing, FOS: Physical sciences, Astrophysics, 01 natural sciences, 7. Clean energy, Real-Time Analysis, Software, Observatory, 0103 physical sciences, ddc:530, Instrumentation and Methods for Astrophysics (astro-ph.IM), 010303 astronomy & astrophysics, Cherenkov radiation, Physics, 010308 nuclear & particles physics, business.industry, Bandwidth (signal processing), Site analysis, [SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM], On-Site Analysis, high-energy gamma-ray observatories, Pipeline transport, 13. Climate action, Data quality, Astrophysics - Instrumentation and Methods for Astrophysics, business
Abstract

The Cherenkov Telescope Array (CTA) observatory will be one of the largest ground-based very high-energy gamma-ray observatories. The On-Site Analysis will be the first CTA scientific analysis of data acquired from the array of telescopes, in both northern and southern sites. The On-Site Analysis will have two pipelines: the Level-A pipeline (also known as Real-Time Analysis, RTA) and the level-B one. The RTA performs data quality monitoring and must be able to issue automated alerts on variable and transient astrophysical sources within 30 seconds from the last acquired Cherenkov event that contributes to the alert, with a sensitivity not worse than the one achieved by the final pipeline by more than a factor of 3. The Level-B Analysis has a better sensitivity (not be worse than the final one by a factor of 2) and the results should be available within 10 hours from the acquisition of the data: for this reason this analysis could be performed at the end of an observation or next morning. The latency (in particular for the RTA) and the sensitivity requirements are challenging because of the large data rate, a few GByte/s. The remote connection to the CTA candidate site with a rather limited network bandwidth makes the issue of the exported data size extremely critical and prevents any kind of processing in real-time of the data outside the site of the telescopes. For these reasons the analysis will be performed on-site with infrastructures co-located with the telescopes, with limited electrical power availability and with a reduced possibility of human intervention. This means, for example, that the on-site hardware infrastructure should have low-power consumption. A substantial effort towards the optimization of high-throughput computing service is envisioned to provide hardware and software solutions with high-throughput, low-power consumption at a low-cost., In Proceedings of the 34th International Cosmic Ray Conference (ICRC2015), The Hague, The Netherlands. All CTA contributions at arXiv:1508.05894

Published
2015

22. Towards a global software architecture for operating and controlling the Cherenkov Telescope Array

Author

Gino Tosti, Josep Colomé, Torsten Schmidt, Ullrich Schwanke, Matthias Füssling, Jordi Campreciós, D. Melkumyan, R. Lindemann, J. Schwarz, E. Lyard, Amanda Weinstein, P. Wegner, Thierry Le Flour, and I. Oya

Subjects
Physics, 010308 nuclear & particles physics, business.industry, Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Instrumentation and Methods for Astrophysics, Ranging, Gamma-ray astronomy, Cherenkov Telescope Array, 01 natural sciences, Domain (software engineering), Software, Optics, Data acquisition, Observatory, 0103 physical sciences, business, 010303 astronomy & astrophysics, Computer hardware, Cherenkov radiation
Abstract

The Cherenkov Telescope Array (CTA) is an international initiative to build the next generation ground-based gamma-ray instrument. CTA will allow studying the Universe in the very-high-energy gamma-ray domain with energies ranging from a few tens of GeV to more than a hundred TeV. It will extend the currently accessible energy band, while increasing the sensitivity by a factor of 10 with respect to existing Cherenkov facilities. Furthermore, CTA will enhance other important aspects like angular and energy resolution. CTA will comprise two arrays, one in the Northern hemisphere and one in the Southern hemisphere, of in total more than one hundred of telescopes of three different sizes. The CTA performance requirements and the increased complexity in operation, control and monitoring of such a large distributed multi-telescope array leads to new challenges in designing and developing the CTA control software system. Indeed, the control software system must be flexible enough to allow for the simultaneous operation of multiple sub-arrays of different types of telescopes, to be ready to react in short timescales to changing weather conditions or to automatic alarms for transient phenomena, to be able to operate the observatory with a minimum personal effort on site, to cope with the malfunctioning of single telescopes or sub-arrays of telescopes, and to readout and control a large and heterogeneous set of devices. This report describes the preliminary architectural design concept for the CTA control software system that will be responsible to manage all the functionality of the CTA array, thereby enabling CTA to reach its scientific goals.

Published
2014

23. Spatially Resolving the very high Energy Emission from MGRO J2019+37 with VERITAS

Author

I. Telezhinsky, Jamie Holder, S. Vincent, A. Popkow, L. C. Reyes, A. Bouvier, Abraham D. Falcone, Eric V. Gotthelf, Karlen Shahinyan, Sinéad M. Griffin, P. Fortin, P. Kaaret, Jean-Francois Rajotte, Ralph Bird, T. Aune, B. Behera, Daniel Nieto, J. P. Finley, Martin Pohl, C. A. Johnson, M. Kertzman, D. Staszak, D. S. Hanna, T. B. Humensky, J. Dumm, Wystan Benbow, K. Ragan, A. O'Faolain de Bhroithe, L. Ciupik, F. Krennrich, John L. Quinn, V. Bugaev, E. Aliu, R. A. Ong, Matthias Beilicke, B. Zitzer, Oleg Kargaltsev, J. V. Tucci, S. T. Griffiths, Mallory S. E. Roberts, Gernot Maier, K. Berger, J. Grube, Manel Errando, A. McCann, Q. Feng, N. Galante, Y. Khassen, H. Prokoph, Amanda Weinstein, S. McArthur, Xuhui Chen, A. N. Otte, S. P. Wakely, M. P. Connolly, Dirk Pandel, A. W. Smith, S. Federici, A. S Madhavan, David Kieda, Henrike Fleischhack, Gordon T. Richards, E. Roache, G. H. Gillanders, Reshmi Mukherjee, G. Hughes, M. J. Lang, A. Wilhelm, Matteo Cerruti, Amy Furniss, David A. Williams, Wei Cui, P. T. Reynolds, Geza Gyuk, Vikram V. Dwarkadas, J. Tyler, Lucy Fortson, P. Moriarty, N. H. Park, J. Millis, J. H. Buckley, G. H. Sembroski, and R. Welsing

Subjects
stars, Photon, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, supernovae : individual (ctb 87), galactic plane, 01 natural sciences, Spectral line, Pulsar, pulsars : individual (psr j2021+3651), Observatory, 0103 physical sciences, pulsar wind nebula, Supernova remnant, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, cygnus region, hess, 010308 nuclear & particles physics, Star formation, Institut für Physik und Astronomie, Astronomy, Astronomy and Astrophysics, gamma-ray emission, gamma rays : stars, psr j2021+3651, milagro, Supernova, 13. Climate action, Space and Planetary Science, Milagro, ddc:520, Astrophysics - High Energy Astrophysical Phenomena, discovery, associations
Abstract

We present very high energy (VHE) imaging of MGRO J2019+37 obtained with the VERITAS observatory. The bright extended ($\sim2^{\circ}$) unidentified Milagro source is located towards the rich star formation region Cygnus-X. MGRO J2019+37 is resolved into two VERITAS sources. The faint point-like source VER J2016+371 overlaps CTB 87, a filled-center remnant (SNR) with no evidence of a supernova remnant shell at the present time. Its spectrum is well fit in the $0.65 - 10$ TeV energy range by a power-law model with photon index $2.3\pm0.4$. VER J2019+368 is a bright extended ($\sim1^{\circ}$) source, that likely accounts for the bulk of the Milagro emission and is notably coincident with PSR J2021+3651 and the star formation region Sh 2-104. Its spectrum in the range $1-30$ TeV is well fit with a power-law model of photon index $1.75\pm0.3$, among the hardest values measured in the VHE band, comparable to that observed near Vela-X. We explore the unusual spectrum and morphology in the radio and X-ray bands to constrain possible emission mechanisms for this source., 9 pages, 8 figures, accepted for publication in the Astrophysical Journal

Published
2014

24. A prototype for the Real-Time analysis of the Cherenkov Telescope Array

Author

Jose Luis Contreras, Juan José Rodríguez-Vázquez, Andrea Bulgarelli, Simon Rosen, Raquel de los Reyes, A. Aboudan, Paola Grandi, S. Buson, Gino Tosti, Andrea Zoli, Domenico Beneventano, Stefan Ohm, Gernot Maier, Sonia Bergamaschi, Vito Conforti, Catherine Boisson, Louis Antonelli, Phil Evans, Martino Marisaldi, Karl Kosack, Giovanni Lamanna, Jürgen Knödlseder, Adriano De Rosa, R. Graciani, Jim Hinton, Nadine Neyroud, Vincenzo Testa, Amanda Weinstein, Denis Bastieri, Alessandro Tacchini, Etienne Lyard, Giovanni De Cesare, Eleonora Torresi, Saverio Lombardi, J. P. Dumm, Lucy Fortson, J. P. Osborne, Giuseppe Malaguti, Matthias Fuessling, Jean Jacquemier, Fulvio Gianotti, Alessandro Carosi, Brian Humensky, Jerzy Burkowski, M. Trifoglio, Luciano Nicastro, Valentina Fioretti, and Matteo Interlandi

Subjects
Cherenkov Telescope Array, Pipeline (computing), Interface (computing), Real-time computing, Cherenkov telescopes, gamma-ray flares, GPU, Intel/Phi, real-time Analysis, science alert system, VHE gamma-ray astronomy, 01 natural sciences, 7. Clean energy, Software, Observatory, 0103 physical sciences, 11. Sustainability, 010303 astronomy & astrophysics, Throughput (business), Physics, 010308 nuclear & particles physics, business.industry, Astronomy, Computer data storage, Software design pattern, Física nuclear, DataBase, Atmospheric Cherenkov telescopes, Observatories, Algorithms, Telescopes, Computer hardware, Data storage, Gamma radiation, Interfaces, business
Abstract

The Cherenkov Telescope Array (CTA) observatory will be one of the biggest ground-based very-high-energy (VHE) gamma-ray observatory. CTA will achieve a factor of 10 improvement in sensitivity from some tens of GeV to beyond 100 TeV with respect to existing telescopes. The CTA observatory will be capable of issuing alerts on variable and transient sources to maximize the scientific return. To capture these phenomena during their evolution and for effective communication to the astrophysical community, speed is crucial. This requires a system with a reliable automated trigger that can issue alerts immediately upon detection of gamma-ray flares. This will be accomplished by means of a Real-Time Analysis (RTA) pipeline, a key system of the CTA observatory. The latency and sensitivity requirements of the alarm system impose a challenge because of the anticipated large data rate, between 0.5 and 8 GB/s. As a consequence, substantial efforts toward the optimization of high-throughput computing service are envisioned. For these reasons our working group has started the development of a prototype of the Real-Time Analysis pipeline. The main goals of this prototype are to test: (i) a set of frameworks and design patterns useful for the inter-process communication between software processes running on memory; (ii) the sustainability of the foreseen CTA data rate in terms of data throughput with different hardware (e.g. accelerators) and software configurations, (iii) the reuse of non-real-time algorithms or how much we need to simplify algorithms to be compliant with CTA requirements, (iv) interface issues between the different CTA systems. In this work we focus on goals (i) and (ii).

Published
2014

25. Discovery of TeV Gamma-ray Emission Toward Supernova Remnant SNR G78.2+2.1

Author

M. Kertzman, A. O'Faolain de Bhroithe, M. Schroedter, Vikram V. Dwarkadas, S. Vincent, Wei Cui, M. J. Lang, S. Thibadeau, A. N. Otte, M. P. Connolly, A. McCann, R. Mukherjee, D. B. Saxon, N. H. Park, J. Millis, T. Aune, J. E. Ward, A. Cesarini, P. Moriarty, John L. Quinn, T. B. Humensky, A. Furniss, Frank Krennrich, A. S. Madhavan, G. Tešić, Gernot Maier, H. Prokoph, A. Varlotta, Wystan Benbow, S. P. Wakely, Eric V. Gotthelf, E. Roache, J. P. Finley, S. Archambault, H. J. Rose, R. A. Ong, Ralph Bird, G. H. Sembroski, P. Kaaret, Amanda Weinstein, Abraham D. Falcone, R. Welsing, Vladimir Vassiliev, L. Ciupik, T. C. Weekes, J. Grube, D. Gall, Geza Gyuk, K. Tsurusaki, S. Federici, Manel Errando, T. C. Arlen, J. H. Buckley, G. H. Gillanders, P. Majumdar, T. J. N. Nelson, S. McArthur, N. Galante, S. Godambe, Dirk Pandel, S. Griffin, G. Finnegan, C. Skole, C. Duke, David A. Williams, N. Karlsson, G. D. Şentürk, T. Weisgarber, H. Huan, E. Aliu, I. Telezhinsky, K. Lee, Jamie Holder, A. Popkow, J. Tyler, A. Bouvier, D. S. Hanna, V. Bugaev, J. S. Perkins, Martin Pohl, Q. Feng, J. Dumm, P. T. Reynolds, David Kieda, M. Theiling, Lucy Fortson, Karen Byrum, S. M. Bradbury, A. Cannon, E. Collins-Hughes, H. Krawczynski, M. Beilicke, M. Orr, G. Hughes, K. Ragan, B. Zitzer, J. Ruppel, R. Dickherber, Y. Khassen, and Luis C. Reyes

Subjects
catalog, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Flux, FOS: Physical sciences, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, cosmic rays, Observatory, 0103 physical sciences, origin, Supernova remnant, 010303 astronomy & astrophysics, 2cg078+2, Astrophysics::Galaxy Astrophysics, acceleration of particles, Physics, search, High Energy Astrophysical Phenomena (astro-ph.HE), particle-acceleration, 010308 nuclear & particles physics, hess, Gamma ray, Institut für Physik und Astronomie, counterpart, Astronomy and Astrophysics, gamma rays: general, Particle acceleration, Crab Nebula, Space and Planetary Science, ism: supernova remnants, ddc:520, High Energy Physics::Experiment, Astrophysics - High Energy Astrophysical Phenomena, fermi
Abstract

We report the discovery of an unidentified, extended source of very-high-energy (VHE) gamma-ray emission, VER J2019+407, within the radio shell of the supernova remnant SNR G78.2+2.1, using 21.4 hours of data taken by the VERITAS gamma-ray observatory in 2009. These data confirm the preliminary indications of gamma-ray emission previously seen in a two-year (2007-2009) blind survey of the Cygnus region by VERITAS. VER J2019+407, which is detected at a post-trials significance of 7.5 standard deviations in the 2009 data, is localized to the northwestern rim of the remnant in a region of enhanced radio and X-ray emission. It has an intrinsic extent of 0.23^{\circ} \pm 0.03^{\circ} (stat)+0.04^{\circ}_{-0.02}^{\circ}(sys) and its spectrum is well-characterized by a differential power law (dN/dE = N_0 \times (E/TeV)^{-\Gamma}) with a photon index of {\Gamma} = 2.37 \pm 0.14 (stat) \pm 0.20 (sys) and a flux normalization of N0 = 1.5 \pm 0.2 (stat) \pm 0.4(sys) \times 10^-12 ph TeV^{-1} cm^{-2} s^{-1}. This yields an integral flux of 5.2 \pm 0.8 (stat) \pm 1.4 (sys) \times 10^-12 ph cm^{-2} s^{-1} above 320 GeV, corresponding to 3.7% of the Crab Nebula flux. We consider the relationship of the TeV gamma-ray emission with the GeV gamma-ray emission seen from SNR G78.2+2.1 as well as that seen from a nearby cocoon of freshly accelerated cosmic rays. Multiple scenarios are considered as possible origins for the TeV gamma-ray emission, including hadronic particle acceleration at the supernova remnant shock., Comment: 18 pages, 5 figures, accepted for publication in ApJ

Published
2013

26. The topological trigger system for the VERITAS upgrade

Author

Amanda Weinstein, Frank Krennrich, Karen Byrum, A. Kreps, Benjamin Zitzer, John S. Anderson, Micheal Oberling, Martin Schroedter, Gary Drake, and Matthew R. Orr

Subjects
Physics, media_common.quotation_subject, Night sky, Astronomy, Radiation imaging, Cherenkov Telescope Array, law.invention, Telescope, Upgrade, Sky, law, Nuclear electronics, Cherenkov radiation, media_common
Abstract

VERITAS (Very Energetic Radiation Imaging Telescope Array System) is an array of four IACTs (Imaging Air Cherenkov Telescopes) located south of Tucson, Arizona, USA. VERITAS observes the Northern Hemisphere sky in VHE (E>100 GeV) gamma rays. A major upgrade of the VERITAS trigger electronics and cameras is currently underway. The upgrade aims to increase the sensitivity and lower the energy threshold of the instrument. The energy threshold can potentially be lowered by more stringent timing discrimination of accidental triggers due to night sky background (NSB). The new VERITAS FPGA-based pattern trigger has been in operation since Novemeber 2011 and provides more stringent timing discrimination by narrowing the required coincidence gate to as low as 3ns. Technical details and operational status of the new VERITAS pattern trigger will be detailed in this work.

Published
2012

27. VERITAS deep observations of the dwarf spheroidal galaxy Segue 1

Author

A. McCann, I. Telezhinsky, R. A. Ong, Jamie Holder, T. Arlen, G. Teić, Philip Kaaret, A. S. Madhavan, Wystan Benbow, S. Vincent, N. Galante, G. D. Entürk, A. Bouvier, G. H. Sembroski, S. McArthur, G. Finnegan, A. W. Smith, S. M. Bradbury, Gernot Maier, M. P. Connolly, S. P. Wakely, Abraham D. Falcone, A. Varlotta, T. Aune, J. Grube, A. Cannon, E. Roache, H. Huan, Matthew R. Orr, R. Dickherber, Manel Errando, Daniel Gall, Karen Byrum, K. Ragan, S. Thibadeau, J. H. Buckley, E. Collins-Hughes, M. Kertzman, Lucy Fortson, J. S. Perkins, H. J. Rose, G. Decerprit, V. Bugaev, Q. Feng, P. Moriarty, M. Vivier, M. Beilicke, M. Schroedter, David A. Williams, Y. Khassen, T. Weisgarber, D. Staszak, J. E. Ward, S. Archambault, Reshmi Mukherjee, T. B. Humensky, A. Furniss, Francesc Ferrer, Geza Gyuk, D. B. Saxon, A. Cesarini, John L. Quinn, B. Zitzer, P. T. Reynolds, N. H. Park, Henric Krawczynski, L. Ciupik, P. Majumdar, E. Aliu, K. Tsurusaki, Jodi Christiansen, C. Skole, D. Hanna, Martin Pohl, S. Godambe, J. Dumm, K. Lee, L. C. Reyes, Vladimir Vassiliev, N. Karlsson, J. P. Finley, T. C. Weekes, Wei Cui, H. Prokoph, R. G. Wagner, David Kieda, M. Theiling, J. Ruppel, Amanda Weinstein, A. N. Otte, Frank Krennrich, Sinéad M. Griffin, and Gareth Hughes

Subjects
Nuclear and High Energy Physics, Astrophysics::High Energy Astrophysical Phenomena, Dwarf galaxy problem, cosmic-rays, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, dark-matter annihilation, 01 natural sciences, local group, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, upper limits, ddc:530, 010303 astronomy & astrophysics, Light dark matter, galactic-center, Astrophysics::Galaxy Astrophysics, Dwarf galaxy, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, 010308 nuclear & particles physics, Hot dark matter, Institut für Physik und Astronomie, Astronomy, Segue, gamma-ray emission, Galaxy, Dwarf spheroidal galaxy, Dark matter halo, large-area telescope, cherenkov telescopes, Astrophysics - High Energy Astrophysical Phenomena, magic telescope, empirical-models
Abstract

The VERITAS array of Cherenkov telescopes has carried out a deep observational program on the nearby dwarf spheroidal galaxy Segue 1. We report on the results of nearly 48 hours of good quality selected data, taken between January 2010 and May 2011. No significant $\gamma$-ray emission is detected at the nominal position of Segue 1, and upper limits on the integrated flux are derived. According to recent studies, Segue 1 is the most dark matter-dominated dwarf spheroidal galaxy currently known. We derive stringent bounds on various annihilating and decaying dark matter particle models. The upper limits on the velocity-weighted annihilation cross-section are $\mathrm{^{95% CL} \lesssim 10^{-23} cm^{3} s^{-1}}$, improving our limits from previous observations of dwarf spheroidal galaxies by at least a factor of two for dark matter particle masses $\mathrm{m_{\chi}\gtrsim 300 GeV}$. The lower limits on the decay lifetime are at the level of $\mathrm{\tau^{95% CL} \gtrsim 10^{24} s}$. Finally, we address the interpretation of the cosmic ray lepton anomalies measured by ATIC and PAMELA in terms of dark matter annihilation, and show that the VERITAS observations of Segue 1 disfavor such a scenario., Comment: Added recently published erratum at the end of the original article

Published
2012

28. Multiwavelength Observations of the very high energy Blazar 1ES2344+514

Author

L. Ciupik, E. Aliu, R. Dickherber, P. Kaaret, R. Guenette, B. Zitzer, J. E. Ward, Gernot Maier, S. P. Swordy, A. Varlotta, S. P. Wakely, D. Boltuch, A. N. Otte, D. S. Hanna, T. C. Arlen, A. Imran, Daniel Gall, Amanda Weinstein, A. Cannon, Thomas Brian Humensky, P. Cogan, M. Schroedter, Lucy Fortson, R. A. Ong, F. Krennrich, Matthew Wood, D. Pandel, Vladimir Vassiliev, Pierre Colin, S. LeBohec, J. S. Perkins, K. Ragan, M. Theiling, Henric Krawczynski, A. Konopelko, J. P. Finley, A. W. Smith, Amy Furniss, Reshmi Mukherjee, Matthias Beilicke, J. A. Toner, T. C. Weekes, Martin Pohl, G. H. Sembroski, A. D. Falcone, P. Moriarty, John Kildea, Stephanie Wissel, David Kieda, T. Weisgarber, J. Grube, Jamie Holder, P. T. Reynolds, Rick Wagner, S. Vincent, David A. Williams, C. M. Hui, Wystan Benbow, Geza Gyuk, V. Bugaev, V. A. Acciari, P. Fortin, H. J. Rose, S. J. Fegan, D. Steele, M. J. Lang, A. Pichel, T. Aune, N. Karlsson, John L. Quinn, D. Horan, M. Kertzman, and G. H. Gillanders

Subjects
Photon, Ciencias Físicas, bl-lacertae objects, Astrophysics, 01 natural sciences, Spectral line, law.invention, Telescope, purl.org/becyt/ford/1 [https], law, veritas, 0103 physical sciences, galaxies, strong flares, individual, Blazar, 010303 astronomy & astrophysics, Physics, markarian 501, 1ES 2344+514, 010308 nuclear & particles physics, spectral variability, Astronomy and Astrophysics, purl.org/becyt/ford/1.3 [https], gamma-ray emission, Galaxy, Massless particle, bl lacertae objects: individual (ies 2344+514), radiation, Astronomía, einstein slew survey, Crab Nebula, 13. Climate action, Space and Planetary Science, correlated variability, cherenkov telescopes, BL Lacertae objects, CIENCIAS NATURALES Y EXACTAS, Flare
Abstract

Multiwavelength observations of the high-frequency-peaked blazar 1ES 2344+514 were performed from October 2007 to January 2008. The campaign represents the first contemporanous data on the object at very high energy (VHE, E > 100 GeV) gamma-ray, X-ray, and UV energies. Observations with VERITAS in VHE gamma-rays yield a strong detection of 20 sigmas with 633 excess events in a total exposure of 18.1 hours live-time. A strong VHE gamma-ray flare on December 7, 2007 is measured at F(>300 GeV) = (6.76 ± 0.62) × 10^-11 cm^-2 s^-1 , corresponding to 48% of the Crab Nebula flux. Excluding this flaring episode, nightly variability at lower fluxes is observed with a time-averaged mean of F(>300 GeV) = (1.06 ± 0.09) × 10^-11 cm^-2 s^-1 (7.6% of the Crab Nebula flux). The differential photon spectrum between 390 GeV and 8.3 TeV for the time-averaged observations excluding December 7, 2007 is well described by a power law with a photon index of 2.78 ± 0.09 (stat) ± 0.15 (syst). A slightly harder photon index of 2.43 ± 0.22stat ± 0.15syst is measured on the flaring night of December 7, 2007. Over the full period of VERITAS observations contemporaneous X-ray and UV data were taken with Swift and RXTE. Variability by a factor of ~7 is evident in the 2-10 keV flux between nightly observations. On December 8, 2007 the highest ever observed X-ray flux from 1ES 2344+514 was measured by Swift XRT at a flux of F(2-10 keV) = (6.58 ± 0.37) × 10^-11 erg cm^-2 s^-1. Evidence for a correlation between the X-ray flux and VHE gamma-ray flux on nightly time-scales is indicated with a Pearson correlation coefficient of r = 0.60 ± 0.11. Contemporaneous spectral energy distributions (SEDs) of 1ES 2344+514 are presented for two distinct flux states. A one-zone synchrotron self-Compton (SSC) model describes both SEDs using parameters consistent with previous SSC modeling of 1ES 2344+514 from non-contemporaneous observations. Fil: Acciari, V. A.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Aliu, E.. University of Delaware; Estados Unidos Fil: Arlen, T.. University of California; Estados Unidos Fil: Aune, T.. University of California; Estados Unidos Fil: Beilicke, M.. University of Washington; Estados Unidos Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Boltuch, D.. University of Delaware; Estados Unidos Fil: Bugaev, V.. University of Washington; Estados Unidos Fil: Cannon, A.. University College Dublin; Irlanda Fil: Ciupik, L.. Adler Planetarium and Astronomy Museum; Estados Unidos Fil: Cogan, P.. McGill University; Canadá Fil: Colin, P.. University of Utah; Estados Unidos Fil: Dickherber, R.. University of Washington; Estados Unidos Fil: Falcone, A.. University of Pennsylvania; Estados Unidos Fil: Fegan, S. J.. University of California; Estados Unidos Fil: Finley, J. P.. Purdue University; Estados Unidos Fil: Fortin, P.. Columbia University; Estados Unidos Fil: Fortson, L. F.. Adler Planetarium and Astronomy Museum; Estados Unidos Fil: Furniss, A.. University of California; Estados Unidos Fil: Gall, D.. Purdue University; Estados Unidos Fil: Gillanders, G. H.. National University of Ireland; Irlanda Fil: Grube, J.. University College Dublin; Irlanda Fil: Guenette, R.. McGill University; Canadá Fil: Gyup, G.. Adler Planetarium and Astronomy Museum; Estados Unidos Fil: Hanna, D.. McGill University; Canadá Fil: Holder, J.. University of Delaware; Estados Unidos Fil: Horan, D.. Ecole Polytechnique; Francia Fil: Hui, C. M.. University of Utah; Estados Unidos Fil: Humensky, T. B.. University Of Chicago; Estados Unidos Fil: Pichel, Ana Carolina. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina

Published
2011

29. Erratum: 'multi-wavelength observations of the flaring gamma-ray blazar 3c 66a in 2008 october' (2011, apj, 726, 43)

Author

Luca Baldini, Reshmi Mukherjee, Carla Buemi, I. de la Calle Perez, A. Varlotta, Wystan Benbow, Mn Mazziotta, Jamie Holder, J. P. Norris, A. Morselli, A. D. Falcone, V. Vitale, Henric Krawczynski, T. A. Porter, Takaaki Tanaka, J. Bregeon, P. Kaaret, Stefano Ciprini, David Sanchez, A. Bouvier, Keith Bechtol, J. M. Lopez, Stephen Fegan, P. D. Smith, J. Grube, A. Cannon, R. Turchetti, Manel Errando, Sang Hun Lee, Igor V. Moskalenko, D. Dumora, J. Mehault, T. Aune, J. Lande, J. E. Ward, F. Gargano, D. Pandel, T. Glanzman, P. Calcidese, S. M. Bradbury, A. Berduygin, Marco Ajello, Jun Kataoka, Olaf Reimer, Paul J. Wang, Mauro Dolci, T. Ylinen, D. Capezzali, Vladimir A. Hagen-Thorn, Seth Digel, H. Y. Hsiao, S. Buson, H. F.W. Sadrozinski, V. Bugaev, R. Bellazzini, V. A. Acciari, S. P. Swordy, J. Saino, G. Tešić, Steven Ritz, F. Piron, D. Parent, Vladimir Vassiliev, Luca Latronico, Julie McEnery, Benoit Lott, Anne Lähteenmäki, A. S. Johnson, S. Cutini, A. Konopelko, Joachim Ripken, Ekaterina Koptelova, Brian L Winer, Martin Pohl, Kari Nilsson, G. Tosti, P. L. Nolan, N. Gehrels, Uwe Bach, Corrado Trigilio, Wen Ping Chen, J. M. Casandjian, Geza Gyuk, S. Rainò, K. Ragan, A. McCann, Roger W. Romani, P. Moriarty, Gernot Maier, Karen Byrum, A. Chekhtman, Michele Fumagalli, D. Boltuch, Talvikki Hovatta, A. N. Otte, D. J. Suson, G. H. Sembroski, A. A. Moiseev, M. Pepe, M. G. Nikolashvili, A. Sievers, Ivan Agudo, D. Carosati, Deborah Dultzin, R. Dickherber, C. M. Raiteri, S. P. Wakely, D. Riquelme, Daniel Gall, Cullen H. Blake, M. Schroedter, R. A. Ong, B. Berenji, S. McArthur, Raúl Mújica, M. Razzano, T. L. Usher, Ryosuke Itoh, M. J. Lang, C. C. Cheung, M. Sorcia, D. da Rio, David S. Davis, G.L. Godfrey, J. F. Ormes, E. Do Couto E Silva, Lars Fuhrmann, E. Cavazzuti, Mark Gurwell, G. Umana, P. Spinelli, L. O. Takalo, Francesco Longo, Mar Roca-Sogorb, Claudia Cecchi, Hugh D. Aller, Atsushi Okumura, S. Thibadeau, Richard Dubois, L. A. Sigua, Elina Lindfors, J. S. Perkins, Melissa Pesce-Rollins, Markus Böttcher, A. C. Sadun, N. Karlsson, G. H. Gillanders, S. Godambe, David Hiriart, L. Ciupik, J. H. Panetta, C. Diltz, Merja Tornikoski, Tyrel J. Johnson, Tsunefumi Mizuno, Jason X. Prochaska, R. A. Cameron, Omer Celik, C. M. Hui, F. Loparco, W. N. Johnson, Charles D. Dermer, N. Galante, Diego F. Torres, E. Forné, S. LeBohec, Lucy Fortson, C. Monte, Rumen Bachev, Matthew Wood, M. Pasanen, M. McCutcheon, E. Charles, Jochen Heidt, S. Carrigan, Amy Furniss, P. Bruel, A. Tramacere, G. Demet Senturk, F. de Palma, H. Ungerechts, Stephan Wagner, G. Finnegan, A. W. Smith, Stefan Funk, O. M. Kurtanidze, M. Ziegler, José L. Gómez, Gloria Spandre, J. G. Thayer, A. Halkola, D. Hadasch, James Chiang, A. Sander, M. F. Aller, J. E. Grove, P. Roustazadeh, D. Horan, Roger Blandford, Zhenwei Yang, P. T. Reynolds, Hideaki Katagiri, E. Roache, Carmelo Sgrò, Riccardo Rando, Gianpiero Tagliaferri, E. Hays, David Kieda, Yasushi Fukazawa, David A. Williams, Amanda Weinstein, N. Vilchez, R. Guenette, Hiromitsu Takahashi, J. H. Buckley, M. Kertzman, R. Ligustri, Markus Ackermann, E. Nuss, M. S. Shaw, David Paneque, E. Aliu, P. Fortin, H. J. Rose, T. Kamae, M. Roth, M. Kuss, Erika Benítez, Emmanouil Angelakis, Jürgen Knödlseder, A. W. Borgland, Nicola Omodei, P. Fusco, F. Krennrich, Valeri M. Larionov, P. Lubrano, M. Hayashida, A. A. Abdo, E. Orlando, N. Palma, J. Ballet, A. Cesarini, D. Starr, Tatiana S. Konstantinova, G. N. Kimeridze, M. Theiling, I. Nestoras, S. Vincent, J. Dashti, Josh Bloom, Jan Conrad, S. Germani, R. Buehler, R. E. Hughes, F. Giordano, Alan P. Marscher, J. P. Finley, John L. Quinn, Luis C. Reyes, Peter F. Michelson, Marcello Giroletti, Emanuele Bonamente, A. Reimer, A. Pichel, P. Giommi, J. A. Ros, D. Steele, M. Ozaki, T. C. Weekes, D. J. Thompson, M. Hauser, Johann Cohen-Tanugi, R. Claus, A. Sillanää, M. S. Strickman, P. Beltrame, Tomaso Belloni, G. A. Caliandro, L. Guillemot, A. A. Arkharov, M. Naumann-Godo, A. P. Waite, Jeffrey D. Scargle, Marco Frailis, K. S. Wood, V. Vasileiou, D. Gasparrini, T. Ohsugi, Paolo Leto, M. Brigida, A. Brez, A. Di Paola, V. Pelassa, Nicola Giglietto, I. A. Grenier, D. S. Hanna, S. G. Jorstad, T. C. Arlen, A. Imran, L. Costamante, M. N. Lovellette, Stephanie Wissel, P. A. Caraveo, Persis S. Drell, Gudlaugur Johannesson, M. Villata, Michael Mommert, Justin Vandenbroucke, T. Weisgarber, Guido Barbiellini, Takeshi Nakamori, Thomas Brian Humensky, E. N. Kopatskaya, Matthias Beilicke, L. Tibaldo, Wei Cui, A. Makeev, M. E. Monzani, C. Favuzzi, Jodi Christiansen, J. B. Thayer, J. A. Zensus, S. Murgia, Denis Bastieri, and Sylvain Guiriec

Subjects
Physics, Space and Planetary Science, Gamma ray, Astronomy, Astronomy and Astrophysics, Multi wavelength, Astrophysics, Blazar
Published
2011

30. Discovery of TeV Gamma Ray Emission from Tycho's Supernova Remnant

Author

S. McArthur, D. S. Hanna, P. Majumdar, J. E. Ward, V. A. Acciari, J. P. Finley, Philip Kaaret, A. S. Madhavan, Wystan Benbow, V. Bugaev, M. Kertzman, Gernot Maier, J. H. Buckley, T. C. Weekes, G. Tešić, M. J. Lang, E. Collins-Hughes, J. S. Perkins, S. P. Wakely, R. Dickherber, A. Cesarini, T. Aune, D. Gall, M. Beilicke, E. Aliu, S. Thibadeau, John L. Quinn, Henric Krawczynski, Karen Byrum, Geza Gyuk, Jamie Holder, G. Demet Senturk, H. J. Rose, A. Furniss, R. A. Ong, A. Varlotta, J. Grube, A. N. Otte, Frank Krennrich, M. Schroedter, Manel Errando, R. Guenette, M. Vivier, Reshmi Mukherjee, S. M. Bradbury, L. Ciupik, Vladimir Vassiliev, A. Cannon, C. M. Hui, S. Griffin, Stephan LeBohec, N. Karlsson, K. Tsurusaki, N. Galante, D. B. Saxon, David Kieda, David A. Williams, M. Theiling, N. H. Park, Patrick Slane, G. Finnegan, A. W. Smith, P. T. Reynolds, C. Duke, Lucy Fortson, Amanda Weinstein, Matthew Wood, G. H. Gillanders, P. Moriarty, S. Godambe, Dirk Pandel, M. Orr, Martin Pohl, K. Ragan, B. Zitzer, E. Roache, Thomas Brian Humensky, John P. Hughes, L. C. Reyes, A. McCann, Wei Cui, T. Weisgarber, S. Vincent, G. H. Sembroski, and T. C. Arlen

Subjects
catalog, Photon, shock acceleration, Point source, chandra, Astrophysics::High Energy Astrophysical Phenomena, Hadron, FOS: Physical sciences, Astrophysics, Type (model theory), 01 natural sciences, spectrum, expansion, 0103 physical sciences, Supernova remnant, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, hess, 010308 nuclear & particles physics, turbulence, Gamma ray, Institut für Physik und Astronomie, Astronomy and Astrophysics, gamma rays: general, astronomy, galactic plane survey, Crab Nebula, Space and Planetary Science, ddc:520, High Energy Physics::Experiment, ism: individual objects (g120.1+01.4, tycho=ver j0025+641), constraints, Astrophysics - High Energy Astrophysical Phenomena, Energy (signal processing)
Abstract

We report the discovery of TeV gamma-ray emission from the Type Ia supernova remnant (SNR) G120.1+1.4, known as Tycho's supernova remnant. Observations performed in the period 2008-2010 with the VERITAS ground-based gamma-ray observatory reveal weak emission coming from the direction of the remnant, compatible with a point source located at $00^{\rm h} \ 25^{\rm m} \ 27.0^{\rm s},\ +64^{\circ} \ 10^{\prime} \ 50^{\prime\prime}$ (J2000). The TeV photon spectrum measured by VERITAS can be described with a power-law $dN/dE = C(E/3.42\;\textrm{TeV})^{-\Gamma}$ with $\Gamma = 1.95 \pm 0.51_{stat} \pm 0.30_{sys}$ and $C = (1.55 \pm 0.43_{stat} \pm 0.47_{sys}) \times 10^{-14}$ cm$^{-2}$s$^{-1}$TeV$^{-1}$. The integral flux above 1 TeV corresponds to $\sim 0.9%$ percent of the steady Crab Nebula emission above the same energy, making it one of the weakest sources yet detected in TeV gamma rays. We present both leptonic and hadronic models which can describe the data. The lowest magnetic field allowed in these models is $\sim 80 \mu$G, which may be interpreted as evidence for magnetic field amplification., Comment: 6 pages, 3 figures. Accepted in ApJL

Published
2011

31. Veritas observations of unusual extragalactic transient swift J164449.3+573451

Author

Philip Kaaret, A. S. Madhavan, Wystan Benbow, D. Hanna, N. Karlsson, Gernot Maier, A. McCann, A. N. Otte, Frank Krennrich, Wei Cui, G. Tešić, S. P. Wakely, M. P. Connolly, A. Pichel, Geza Gyuk, H. Prokoph, C. M. Hui, E. Roache, D. Gall, M. Vivier, E. Collins-Hughes, S. Thibadeau, Jamie Holder, T. B. Humensky, Martin Pohl, Amanda Weinstein, P. T. Reynolds, A. Bouvier, David Kieda, M. Schroedter, R. Mukherjee, M. Theiling, J. E. Ward, J. H. Buckley, D. B. Saxon, Luis C. Reyes, S. Vincent, N. H. Park, G. H. Sembroski, T. Aune, R. A. Ong, L. Ciupik, A. Cesarini, T. Arlen, Markus Böttcher, K. Tsurusaki, Lucy Fortson, R. Dickherber, A. Furniss, John L. Quinn, David A. Williams, A. Varlotta, K. Ragan, M. Kertzman, P. Majumdar, G. H. Gillanders, H. J. Rose, A. D. Falcone, C. Skole, J. S. Perkins, S. Godambe, S. McArthur, V. Bugaev, M. Orr, G. Hughes, S. M. Bradbury, A. Cannon, J. Ruppel, J. Grube, Manel Errando, J. Tyler, N. Galante, T. Weisgarber, A. W. Smith, S. Griffin, H. Huan, Henric Krawczynski, J. P. Finley, P. Moriarty, M. Beilicke, E. Aliu, and D. Staszak

Subjects
Swift, Ciencias Físicas, Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, Flux, FOS: Physical sciences, Astrophysics, 7. Clean energy, 01 natural sciences, purl.org/becyt/ford/1 [https], Observatory, gamma-ray astronomy, gamma rays: galaxies, 0103 physical sciences, 010303 astronomy & astrophysics, computer.programming_language, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), accretion, accretion disks, 010308 nuclear & particles physics, Institut für Physik und Astronomie, Astronomy and Astrophysics, purl.org/becyt/ford/1.3 [https], radiation mechanisms: non-thermal, non-thermal [radiation mechanisms], Astronomía, Space and Planetary Science, active [galaxies], galaxies [gamma rays], cherenkov telescopes, Transient (oscillation), light, Astrophysics - High Energy Astrophysical Phenomena, computer, CIENCIAS NATURALES Y EXACTAS
Abstract

We report on very high energy (E > 100 GeV) gamma-ray observations of Swift J164449.3+573451, an unusual transient object first detected by the Swift Observatory and later detected by multiple radio, optical, and X-ray observatories.A total exposure of 28 hr was obtained on Swift J164449.3+573451 with the Very Energetic Radiation Imaging Telescope Array System (VERITAS) during 2011 March 28-April 15. We do not detect the source and place a differential upper limit on the emission at 500 GeV during these observations of 1.4 x 10^-12 erg cm^-2 s^-1 (99 % confidence level). We also present time-resolved upper limits and use a flux limit averaged over the X-ray flaring period to constrain various emission scenarios that can accommodate both the radio-through-X-ray emission detected from the source and the lack of detection by VERITAS. Fil: Aliu, E.. Columbia University; Estados Unidos Fil: Arlen, T.. University of California; Estados Unidos Fil: Aune, T.. University of California; Estados Unidos Fil: Beilicke, M.. University of Washington; Estados Unidos Fil: Benbow, W.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Bottcher, M.. Ohio University; Estados Unidos Fil: Bouvier, A.. University of California; Estados Unidos Fil: Bradbury, S. M.. University of Leeds; Reino Unido Fil: Buckley, J. H.. University of Washington; Estados Unidos Fil: Bugaev, V.. University of Washington; Estados Unidos Fil: Cannon, A.. University College Dublin; Irlanda Fil: Cesarini, A.. National University of Ireland Galway; Irlanda Fil: Ciupik, L.. Adler Planetarium and Astronomy Museum; Estados Unidos Fil: Collins Hughes, E.. University College Dublin; Irlanda Fil: Connolly, M. P.. National University of Ireland Galway; Irlanda Fil: Cui, W.. Purdue University; Estados Unidos Fil: Dickherber, R.. University of Washington; Estados Unidos Fil: Errando, M.. Columbia University; Estados Unidos Fil: Falcone, A.. University of Pennsylvania; Estados Unidos Fil: Finley, J. P.. Purdue University; Estados Unidos Fil: Fortson, L.. University Of Minnesota; Estados Unidos Fil: Furniss, A.. University of California; Estados Unidos Fil: Galante, N.. Harvard-Smithsonian Center for Astrophysics; Estados Unidos Fil: Gall, D.. University of Iowa; Estados Unidos Fil: Gillanders, G. H.. National University of Ireland Galway; Irlanda Fil: Godambe, S.. University of Utah; Estados Unidos Fil: Griffin, S.. McGill University; Canadá Fil: Grube, J.. Adler Planetarium and Astronomy Museum; Estados Unidos Fil: Gyuk, G.. Adler Planetarium and Astronomy Museum; Estados Unidos Fil: Pichel, Ana Carolina. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: The Veritas Collaboration.

Published
2011

32. Erratum: 'veritas observations of a very high energy γ-ray flare from the blazar 3c 66a' (2009, apj, 693, l104)

Author

A. Varlotta, John Kildea, M. J. Lang, M. Beilicke, Wystan Benbow, Henric Krawczynski, R. G. Wagner, J. P. Finley, Lucy Fortson, Matthew Wood, A. Cannon, Martin Pohl, G. H. Sembroski, D. Pandel, Yousaf M. Butt, J. A. Toner, N. Karlsson, M. McCutcheon, A. McCann, C. M. Hui, T. C. Weekes, R. Dickherber, P. Moriarty, E. Hays, J. Grube, L. Ciupik, J. S. Perkins, Thomas Brian Humensky, V. Bugaev, V. A. Acciari, Stephanie Wissel, Geza Gyuk, David A. Williams, E. Aliu, Y. C. Chow, Reshmi Mukherjee, D. Horan, Amanda Weinstein, David Kieda, R. Guenette, M. K. Daniel, R. A. Ong, M. Kertzman, D. Petry, B. Zitzer, Gernot Maier, K. Ragan, S. M. Bradbury, P. Fortin, H. J. Rose, A. Konopelko, Markus Böttcher, S. LeBohec, P. Kaaret, S. P. Wakely, G. H. Gillanders, S. Godambe, S. P. Swordy, S. J. Fegan, Daniel Gall, O. Celik, D. Steele, F. Pizlo, Karen Byrum, D. S. Hanna, T. C. Arlen, M. Schroedter, A. Imran, Jamie Holder, J. E. Ward, Wei Cui, A. Cesarini, A. N. Otte, John L. Quinn, A. W. Smith, J. Millis, K. G. Gibbs, E. Roache, A. D. Falcone, P. Cogan, Luis C. Reyes, Vladimir Vassiliev, Amy Furniss, Tulun Ergin, F. Krennrich, M. Theiling, J. H. Buckley, P. T. Reynolds, and T. Nagai

Subjects
Physics, High energy, Space and Planetary Science, law, Astronomy, Astronomy and Astrophysics, Astrophysics, Blazar, Flare, law.invention
Published
2010

33. A connection between star formation activity and cosmic rays in the starburst galaxy M82

Author

V. A. Acciari, M. J. Lang, A. Cesarini, Pierre Colin, John L. Quinn, L. C. Reyes, K. G. Gibbs, R. Guenette, J. E. Ward, A. N. Otte, Frank Krennrich, A. McCann, S. P. Swordy, R. Dickherber, T. Aune, Karen Byrum, T. Weisgarber, S. Thibadeau, M. Theiling, G. H. Gillanders, S. Godambe, Philip Kaaret, M. Schroedter, D. S. Hanna, T. C. Arlen, A. Imran, S. M. Bradbury, Wystan Benbow, J. Millis, Reshmi Mukherjee, F. Pizlo, S. J. Fegan, M. Beilicke, John Kildea, D. Steele, N. Karlsson, M. McCutcheon, David A. Williams, P. Moriarty, Gernot Maier, A. Cannon, Stephanie Wissel, D. Pandel, S. P. Wakely, Daniel Gall, D. Boltuch, J. H. Buckley, N. Galante, R. A. Ong, S. LeBohec, P. Cogan, G. Finnegan, A. W. Smith, David Kieda, Vladimir Vassiliev, C. Duke, Wei Cui, E. Roache, Thomas Brian Humensky, Jamie Holder, Lucy Fortson, Matthew Wood, V. Bugaev, S. McArthur, L. Ciupik, Amy Furniss, Geza Gyuk, E. Aliu, A. Varlotta, B. Zitzer, J. S. Perkins, K. Ragan, A. Konopelko, Martin Pohl, G. H. Sembroski, Henric Krawczynski, T. Nagai, R. G. Wagner, C. M. Hui, D. Horan, M. Kertzman, J. Grube, J. P. Finley, T. C. Weekes, P. T. Reynolds, S. Vincent, Y. C. Chow, O. Celik, Manuel A. Bautista, Amanda Weinstein, P. Fortin, and H. J. Rose

Subjects
Physics, High rate, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Multidisciplinary, 010308 nuclear & particles physics, Star formation, Protogalaxy, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astronomy, Cosmic ray, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Radiation, 01 natural sciences, Galaxy, Supernova, Stars, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010303 astronomy & astrophysics, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Although Galactic cosmic rays (protons and nuclei) are widely believed to be dominantly accelerated by the winds and supernovae of massive stars, definitive evidence of this origin remains elusive nearly a century after their discovery [1]. The active regions of starburst galaxies have exceptionally high rates of star formation, and their large size, more than 50 times the diameter of similar Galactic regions, uniquely enables reliable calorimetric measurements of their potentially high cosmic-ray density [2]. The cosmic rays produced in the formation, life, and death of their massive stars are expected to eventually produce diffuse gamma-ray emission via their interactions with interstellar gas and radiation. M 82, the prototype small starburst galaxy, is predicted to be the brightest starburst galaxy in gamma rays [3, 4]. Here we report the detection of >700 GeV gamma rays from M 82. From these data we determine a cosmic-ray density of 250 eV cm-3 in the starburst core of M 82, or about 500 times the average Galactic density. This result strongly supports that cosmic-ray acceleration is tied to star formation activity, and that supernovae and massive-star winds are the dominant accelerators., 18 pages, 4 figures; published in Nature; Version is prior to Nature's in-house style editing (differences are minimal)

Published
2009

34. Measurement of the ratioB(B+→Xeν)/B(B0→Xeν)

Author

Bruce Schumm, A. Lu, R. C. Field, F. Salvatore, A. J. Hart, L. Bosisio, N. De Groot, A. Roodman, G. Finocchiaro, V. Luth, M. S. Alam, T. Schalk, A. W. Weidemann, D. J.J. Mangeol, H. J. Bulten, A. N. Yushkov, R. Messner, T. Held, K. E. Ford, O. Hamon, C. H. Cheng, A. Snyder, M. A. Mazzoni, G. Wormser, Mauro Morandin, A. J. Bevan, F. Muheim, A. Höcker, T. Pulliam, Nicolas Berger, Roland Waldi, F. Ferroni, C. Gatto, J. R. Fry, V. B. Golubev, G. Rong, V. Eschenburg, P. Taras, E. P. Solodov, S. M. Spanier, Kelin Wang, S. Luitz, D. S. Best, M. K. Sullivan, M. G. Greene, M. Gaspero, G. Nesom, S. Bailey, D. C. Williams, D. Su, D. A. Bowerman, T. Schroeder, R. de Sangro, G. Therin, Paul Fraser Harrison, J. Stelzer, S. L. Wu, J. P. Coleman, L. M. Mir, T. R. McMahon, T. Piatenko, V. Poireau, A. Soha, Maurizio Pierini, R. Bartoldus, M. Chao, M. Piccolo, S. Brunet, W. H. Toki, W. Dunwoodie, M. A. Winter, P. M. Patel, Stephen Robert Wagner, James R. Wilson, C. C. Young, R. Liu, J.H. Panetta, T. Hadig, G. Batignani, Zongfu Yu, K. R. Schubert, M. Steinke, G. Crosetti, Enrico Robutti, B. T. Meadows, M. Carpinelli, Lydia Roos, M. Morganti, C. K. Lae, A. M. Eisner, U. Mallik, Mohamed H. Ahmed, G. Raven, Hui Li, N. A. Roe, M. J. Charles, M. Mandelkern, J. I. Yi, M. D. Sokoloff, C. M. Brown, M. Saleem, M. Zito, L. Del Buono, Roberto Calabrese, C. Cartaro, Sergio Grancagnolo, A. Petzold, R. Eckmann, M. M. Macri, S. J. Sekula, P. R. Burchat, B. C. Shen, C. T. Potter, Mario Giorgi, G. Hamel de Monchenault, R. S. Panvini, A. Jawahery, J. A. McKenna, R. F. Schwitters, S. D. Foulkes, M. Pelizaeus, R. G. Jacobsen, D. del Re, J. Va’vra, U. Langenegger, V. B. Koptchev, P. D. Jackson, R. L. Flack, R. K. Yamamoto, K. A. Ulmer, Markus Cristinziani, J. Ocariz, N. I. Geddes, W. D. Hulsbergen, M. V. Purohit, S. Morganti, Sridhara Dasu, S. Ahmed, M. G. Green, D. Gamba, J. L. Ritchie, S. Schrenk, A. P. Onuchin, T. J. Harrison, J. W. Gary, S. Yang, Francesco Fabozzi, F. X. Yumiceva, W. Kozanecki, I. Kitayama, G. W. Brandenburg, A. Chen, Matteo Rama, M. Davier, M. Wittgen, S. Prell, G. Blaylock, H. K. Hadavand, Jie Zhang, B. A. Petersen, C. L. Brown, G. Cibinetto, James H Cochran, J.J. Reidy, E. Chen, Q. H. Guo, B. Stugu, B. Lewandowski, G. Eigen, D. Dujmic, A. Soffer, J. W. Berryhill, F. Safai Tehrani, J. Chauveau, R. S. Dubitzky, F. Gallo, G. Marchiori, J. A. Nash, M. Lo Vetere, J. M. LoSecco, Pierluigi Paolucci, C. M. Cormack, N. B. Sinev, T. M. Hong, N. Danielson, F. Galeazzi, Denis Bernard, Marcello Rotondo, H. U. Flaecher, A. Zghiche, T. B. Moore, M. G. Wilson, G. Vasileiadis, R. J. Wilson, L. M. Cremaldi, D. A. Roberts, F. E. Taylor, J. A. Kadyk, G. Grosdidier, R. R. Kofler, M. Krishnamurthy, Chunhui Chen, F. Simonetto, M. T. Graham, D. E. Wagoner, J. W. Lamsa, W. O. Ruddick, Gabriele Simi, R. H. Schindler, Shanhui Fan, S. H. Robertson, C. L. Davis, D. Dong, D. G. Hitlin, P. Rankin, Herbert Koch, F. Bellini, M. Haire, J. C. Williams, T. Cuhadar-Donszelmann, E. Won, V. Halyo, T. Glanzman, S. Ye, T. C. Petersen, R. Ter-Antonyan, L. Gladney, C. Touramanis, A. W. Borgland, Y. S. Zhu, J. R. Gaillard, R. Faccini, S. A. Majewski, R. Kroeger, F. Ferrarotto, A. J. Lankford, F. Le Diberder, D. B. MacFarlane, F. Forti, Marcella Bona, B. Dahmes, J. D. Richman, G. W. London, A. B. Breon, Peter Elmer, G. Wagner, J. Libby, D. Boutigny, A. T. Watson, P. Grenier, D. E. Hutchcroft, J. M. Bauer, C. Dallapiccola, Ch De La Vaissière, Nicola Neri, Y. Karyotakis, S. E. Morgan, D. Côté, M. Dickopp, M. Legendre, J. J. Hollar, S. F. Ganzhur, X. C. Lou, H. R. Band, William A. Wenzel, W. S. Lockman, T. J. Orimoto, D. Fortin, V. N. Ivanchenko, T. S. Mattison, D. A. Sanders, I. Eschrich, J. Schwiening, J. Marks, Q. L. Zeng, G. A. Cowan, J. P. Lees, H. Marsiske, M. Lu, P. Tan, Liliana Teodorescu, Claudio Campagnari, J. J. Walsh, A. M. Eichenbaum, M. R. Convery, C. M. Hawkes, Colin Jessop, R. Prepost, Te Latham, C. Hast, D. J. Lange, G. Piredda, A. Dvoretskii, J. C. Chen, J. Allison, A. M. Rahimi, S. Christ, G. S. Abrams, Sai-Juan Chen, R. Garnet, R. Nogowski, F. Blanc, Lijun Zhang, M. Morii, A. M. Lutz, D. N. Brown, P. J. Oddone, Amir Farbin, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, M. Bruinsma, W. J. Wisniewski, V. Lombardo, A. A. Salnikov, F. Bucci, C. D. Buchanan, F. R. Wappler, K. T. Flood, P. Kyberd, J. E. Sundermann, A. Olivas, Sh. Rahatlou, E. A. Kravchenko, M. Weaver, S. Saremi, G. D. Lafferty, Peter S. Kim, U. Egede, A. Satpathy, G. Sciolla, S. Passaggio, R. Baldini-Ferroli, W. Bhimji, D. Kirkby, C. Hearty, H. L. Snoek, M. C. Hodgkinson, G. Vasseur, E. A. Eckhart, A. V. Gritsan, M. L. Perl, J. T. Boyd, M. S. Gill, P. F. Giraud, J. C. Dingfelder, D. J. Summers, Yuehong Xie, Roberto Covarelli, R. W. Kadel, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, M. C. Simani, Joseph Izen, V. Miftakov, A. Palano, Y. P. Lau, Julie Malcles, R. J. Sobie, A. Perazzo, C. Voena, K. K. Gan, Ch Yèche, C. A. Heusch, L. Vitale, F. Martinez-Vidal, A. J.S. Smith, Dominik Müller, F. Anulli, M. Pripstein, S. Dittongo, M. Fritsch, S. S. Hertzbach, Y. Groysman, H. Kagan, G. Kukartsev, J. Kroseberg, G. Cavoto, L. Wilden, G. Vuagnin, E. O. Olaiya, Q. K. Wong, M. A. Saeed, N. R. Barlow, S. Playfer, R. N. Cahn, C. P. O'Grady, F. Palombo, Vivek Sharma, C. Voci, M. A. Baak, R. Godang, P. Patteri, James D. Olsen, Maria Roberta Monge, A. V. Telnov, J. Adam Cunha, A. Mihalyi, G. Lynch, Crisostomo Sciacca, D. Aston, K. Koeneke, M. L. Kocian, L. T. Kerth, A. Zallo, F. Couderc, E. Paoloni, H. M. Lacker, H. L. Lynch, F. Colecchia, P. Spradlin, X. R. Chen, M. T. Ronan, M. P. Kelly, M. Barrett, Eleonora Luppi, Justin Albert, R. Cowan, S. Jayatilleke, D. M. Strom, K. S. Chaisanguanthum, M. Pioppi, B. Cheng, V. E. Blinov, D. W. G. S. Leith, W. N. Cottingham, E. Charles, Fabio Cossutti, G. Schott, J. Schubert, Davide Piccolo, I. Narsky, D. Bettoni, G. Calderini, Yu I. Skovpen, V. E. Ozcan, Douglas Wright, I. J. Forster, P. C. Bloom, N. S. Knecht, A. Lazzaro, D. J. Bard, R. Capra, G. W. Morton, M. H. Schune, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, A. Ryd, J. H. von Wimmersperg-Toeller, F. Di Lodovico, Bernard Aubert, D. J. Payne, U. Nauenberg, A. Samuel, Silvano Tosi, J. Brose, P. S. Jackson, A. Calcaterra, J. M. Roney, Luca Lista, C. Roat, W. M. Bugg, D. Kovalskyi, J. G. Smith, D. P. Stoker, M. B. Nikolich, Alberto Lusiani, R. Claus, Matteo Negrini, Thomas Allmendinger, S. Bettarini, Corrado Angelini, B. Bhuyan, A. Gaidot, O. L. Buchmueller, A. Khan, V. P. Druzhinin, C. Bozzi, K. Honscheid, C. A. Chavez, A. Buzzo, R. J. Barlow, N. Chevalier, M. Posocco, G. P. Gopal, Amanda Weinstein, D. Monorchio, H. W. Zhao, P. D. Dauncey, G. J. Grenier, Mirco Andreotti, S. Emery, Fergus Wilson, P. Poropat, H. P. Paar, J. E. Brau, X. Giroux, Alessio Sarti, Yu. G. Kolomensky, B. Franek, R. Frey, P. J. Clark, M. H. Kelsey, R. K. Mommsen, K. Paick, A. Dorigo, JunJie Wu, M. A. Mazur, T. Abe, R. J. Parry, D. H. Wright, C. Patrignani, G. Rizzo, V. Tisserand, I. M. Peruzzi, W. Roethel, M. Bondioli, J. R. Johnson, J. Strube, L. Piemontese, E. Gabathuler, W. R. Innes, F. C. Porter, T. W. Beck, S. I. Serednyakov, F. Bianchi, E. Feltresi, D. D. Brown, S. J. Gowdy, V. Lillard, R. Barate, A. E. Rubin, Sw. Banerjee, Maurizio Biasini, H. B. Crawley, D. Hufnagel, Pu Wang, A. Seiden, G. B. Mohanty, Janice Button-Shafer, S. Otto, G. Mancinelli, J. A. Ernst, G. R. Bonneaud, B. Spaan, H. Briand, L. Lanceri, E. Grauges-Pous, Stéphane Plaszczynski, K. Goetzen, J. Dorfan, B. N. Ratcliff, M. Datta, J. L. Harton, N. D. Qi, A. M. Boyarski, R. Schwierz, Wouter Verkerke, J. J. Back, Ch Thiebaux, H. Staengle, A. E. Blinov, E. Torrence, P. David, W. T. Meyer, E. J. Hill, P. E. Kutter, P. K. Behera, M. Verderi, Ph Leruste, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, A. Santroni, Virginia Azzolini, L. Li Gioi, S. Willocq, G. Della Ricca, D. Thiessen, Y. B. Pan, R. Kowalewski, I. Ofte, Nicola Cavallo, Olga Igonkina, W. T. Ford, Tim Adye, R. D. Kass, A. J. Edwards, Hyun-Chul Kim, A. Hauke, O. P. Dubois-Felsmann, H. Nicholson, Martino Margoni, G. P. Taylor, M. J.J. John, R. Aleksan, R. Contri, G. De Nardo, C. Lu, D. Judd, V. Lepeltier, and M. Benayoun

Subjects
Nuclear and High Energy Physics, Meson, media_common.quotation_subject, Electron–positron annihilation, Hadron, Elementary particle, Electron, Asymmetry, 01 natural sciences, Nuclear physics, Particle decay, Theoretical physics, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, B meson, Nuclear Experiment, 010306 general physics, media_common, Boson, Physics, Branching fraction, 010308 nuclear & particles physics, High Energy Physics::Phenomenology, Crystallography, High Energy Physics::Experiment, Lepton
Abstract

We report measurements of the inclusive electron momentum spectra in decays of charged and neutral B mesons, and of the ratio of semileptonic branching fractions B(B+-> Xe nu) and B(B-0 -> Xe nu). These were performed on a sample of 231x10(6) B (B) over bar events recorded with the BABAR detector at the Upsilon(4S) resonance. Events are selected by fully reconstructing a hadronic decay of one B meson and identifying an electron among the decay products of the recoiling (B) over bar meson. We obtain B(B+-> Xe nu)/B(B-0 -> Xe nu)=1.074 +/- 0.041((stat))+/- 0.026((syst)).

Published
2006

35. Search for the decayB+→τ+ντ

Author

H. J. Bulten, A. N. Yushkov, A. Höcker, T. Held, K. E. Ford, Roberto Calabrese, B. C. Shen, L. Li Gioi, G. P. Taylor, Matteo Rama, J. Chauveau, A. Roodman, J. P. Lees, M. J.J. John, S. B. Zain, C. M. Cormack, M. Bondioli, T. Pulliam, J. Ocariz, G. De Nardo, S. Prell, Roland Waldi, F. Ferroni, D. Monorchio, Denis Bernard, P. Patteri, T. J. Harrison, J. W. Gary, Nicola Cavallo, Jie Zhang, James H Cochran, M. Battaglia, C. Lu, D. Judd, J. Va'vra, T Schroeder, B. Lewandowski, A. Soffer, C. J. Flacco, J. M. Thompson, M. K. Sullivan, A. D'Orazio, E. P. Solodov, J.J. Reidy, Paul Jackson, D. A. Bowerman, Michael Kelly, J. L. Ritchie, Paul Fraser Harrison, H. W. Zhao, R. Aleksan, F. Gallo, A. M. Eisner, Bruce Schumm, Olga Igonkina, Julie Malcles, John Allison, Hui Li, J. A. Kadyk, Chunhui Chen, P. D. Dauncey, O. Hamon, S. Ricciardi, I. Kitayama, S. I. Serednyakov, Alexis Pompili, Tetiana Hryn'ova, H. K. Hadavand, R. S. Dubitzky, P. M. Patel, W. T. Ford, Tim Adye, J. M. LoSecco, R. D. Kass, Sergio Grancagnolo, Stephen Robert Wagner, J.H. Panetta, K. T. Flood, Mirco Andreotti, D. Dong, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, A. J. Hart, V. B. Golubev, K. R. Schubert, N. B. Sinev, E. Won, S. Saremi, T. M. Hong, M. Carpinelli, G. Therin, L. Bosisio, A. Lazzaro, D. Su, R. Sacco, M. Pripstein, Y. S. Zhu, W. D. Hulsbergen, J. W. Berryhill, R. Andreassen, G. Mancinelli, J. Schubert, V. Poireau, J. R. Gaillard, Davide Piccolo, A. B. Breon, H. L. Snoek, M. T. Naisbit, Lydia Roos, G. Benelli, M. V. Purohit, M. Morganti, S. E. Morgan, S. A. Majewski, M. Piccolo, M. T. Allen, Bruce Mellado, M. Dickopp, Pierluigi Paolucci, K. Goetzen, E. O. Olaiya, M. A. Saeed, Yuehong Xie, N. Danielson, Y. Karyotakis, M. Wittgen, Y. P. Lau, Peter Elmer, J. Schwiening, L. Del Buono, G. Eigen, C. K. Lae, G. Rizzo, G. Batignani, A. J.S. Smith, F. Galeazzi, K. K. Gan, R. Eckmann, A. Gaidot, Liliana Teodorescu, X. C. Lou, J. J. Walsh, N. R. Barlow, J. Stelzer, W. Gradl, M. Mandelkern, V. E. Ozcan, F. Palombo, Junqiao Wu, Vivek Sharma, T. C. Petersen, A. M. Rahimi, T. E. Latham, Niels Anton van Bakel, J. P. Burke, E. Torrence, R. K. Yamamoto, P. David, C. M. Hawkes, G. Lynch, James D. Olsen, G. S. Abrams, G. P. Gopal, Amanda Weinstein, G. Wagner, D. N. Brown, B. T. Meadows, G. Raven, N. De Groot, S. Pacetti, M. G. Green, J. I. Yi, M. D. Sokoloff, C. M. Brown, Pierre-Francois Giraud, A. Santroni, K. A. Ulmer, A. A. Salnikov, Virginia Azzolini, R. Cowan, James R. Wilson, G. D. Lafferty, C. H. Cheng, M. Steinke, K. Yi, A. J. Edwards, M. G. Wilson, M. Davier, D. A. Roberts, F. E. Taylor, F. Di Lodovico, Bernard Aubert, G. Grosdidier, I. Narsky, Mohamed H. Ahmed, A. K. Mohapatra, D. J. Payne, Hyun-Chul Kim, J. R. Fry, K. Peters, K. Suzuki, M. Lu, M. T. Graham, U. Nauenberg, V. Lombardo, Corrado Angelini, U. Langenegger, A. M. Eichenbaum, Francesco Fabozzi, G. Vasileiadis, R. Liu, Marie Helene Schune, T. Glanzman, A. Samuel, B. Bhuyan, O. L. Buchmueller, R. F. Schwitters, F. Safai Tehrani, R. Messner, Silvano Tosi, R. de Sangro, H. Nicholson, S. L. Wu, D. B. MacFarlane, P. C. Bloom, Patricia R. Burchat, Martino Margoni, G. Rong, V. Eschenburg, U. Egede, P. Taras, G. Sciolla, V. P. Druzhinin, C. Bozzi, K. Honscheid, C. A. Chavez, W. Kozanecki, N. S. Knecht, S. Brunet, W. H. Toki, M. L. Perl, A. Buzzo, R. J. Barlow, M. Gaspero, N. Chevalier, M. Posocco, J. T. Boyd, G. Nesom, Joseph Izen, R. Capra, G. W. Morton, P. S. Jackson, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, A. Ryd, J. M. Roney, Luca Lista, Wp Vazquez, M. Pioppi, C. A. Heusch, K. A. George, J. G. Smith, M. B. Nikolich, B. Cheng, V. E. Blinov, C. L. Edgar, Maurizio Biasini, D. W. G. S. Leith, W. N. Cottingham, E. A. Kravchenko, A. Oyanguren, Owen Rosser Long, G. Calderini, A. Seiden, B. Stugu, C. Voci, G. B. Mohanty, J. A. Ernst, M. Datta, S. F. Ganzhur, Crisostomo Sciacca, D. Aston, Wouter Verkerke, J. J. Back, Ch Thiebaux, H. Staengle, Markus Cristinziani, F. X. Yumiceva, G. Blaylock, R. Frey, M. H. Kelsey, T. Abe, J. R. Johnson, R. R. Kofler, S. Willocq, M. Krishnamurthy, D. E. Wagoner, G. Della Ricca, Y. B. Pan, S. Bettarini, W. O. Ruddick, Gabriele Simi, R. Kowalewski, Ch Yèche, I. Ofte, T. B. Moore, G. Kukartsev, C. L. Davis, R. Gamet, S. Rodier, A. Hauke, R. N. Cahn, Maria Roberta Monge, M. Pappagallo, A. Mihalyi, H. Schröder, S. Luitz, J. A. McKenna, D. C. Williams, E. Paoloni, M. Chao, P. Spradlin, X. R. Chen, Kenji Hamano, M. T. Ronan, M. Haire, J. C. Williams, R. Bartoldus, V. Eyges, Zongfu Yu, M. J. Charles, G. W. Brandenburg, D. del Re, R. Contri, J. A. Nash, M. Lo Vetere, Francesco Polci, M. Pelizaeus, F. Bellini, V. Lepeltier, M. Benayoun, R. Godang, B. Dahmes, H. M. Lacker, H. L. Lynch, M. Barrett, A. Satpathy, D. M. Strom, K. S. Chaisanguanthum, E. Charles, Fabio Cossutti, D. Bettoni, T. Cuhadar-Donszelmann, Yu I. Skovpen, C. Touramanis, F. Simonetto, W. F. Mader, R. H. Schindler, M. Fritsch, S. S. Hertzbach, Shanhui Fan, W. Menges, Y. Groysman, L. Wilden, Colin Jessop, M. L. Kocian, R. Prepost, W. A. Wenzel, R. Nogowski, Xiang Li, J. Libby, K. Wang, R. Kroeger, D. Boutigny, I. Eschrich, C. D. Buchanan, Claudio Campagnari, A. Olivas, A. T. Watson, F. Forti, H. Kagan, M. Weaver, M. Saleem, R. Baldini-Ferroli, E. A. Eckhart, D. J. Summers, W. Bhimji, D. Kirkby, G. Vasseur, K. C. Schofield, B. G. Fulsom, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, R. Cenci, S. Playfer, C. P. O'Grady, L. Vitale, A. Zallo, F. Martinez-Vidal, Dominik Müller, Stéphane Plaszczynski, M. Pierini, Akram Khan, M. A. Baak, F. Couderc, Q. K. Wong, M. Legendre, A. V. Telnov, K. Koeneke, Eleonora Luppi, Justin Albert, A. Kreisel, S. Jayatilleke, T. S. Mattison, D. A. Sanders, D. S. Best, C Hearty, P. Tan, L. M. Mir, T. R. McMahon, T. Piatenko, C. Hast, D. J. Lange, G. Piredda, A. Dvoretskii, J. C. Chen, M. Morii, F. R. Wappler, E. Grauges, Sh. Rahatlou, C. T. Potter, Mario Giorgi, S. Morganti, P. Kim, Sridhara Dasu, E. Feltresi, S. Otto, X. Giroux, F. Bucci, Douglas Wright, I. J. Forster, D. J. Bard, J. H. von Wimmersperg-Toeller, B. Spaan, P. Lund, R. L. Flack, J. Brose, A. Calcaterra, H. Briand, A. D. Bukin, C. Roat, D. P. Stoker, L. Lanceri, R. Claus, Matteo Negrini, H. P. Paar, J. E. Brau, J. C. Dingfelder, R. C. Field, F. Salvatore, W. M. Bugg, D. Kovalskyi, Jeffrey Richman, Alberto Lusiani, Yu. G. Kolomensky, P. Roudeau, V. Halyo, J. F. Hirschauer, G. Finocchiaro, V. Luth, L. Gladney, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, M. S. Alam, F. Le Diberder, Marcella Bona, A. Snyder, F. F. Wilson, T. J. Orimoto, D. Fortin, Janice Button-Shafer, M. Spitznagel, L. T. Kerth, J. Marks, G. R. Bonneaud, D. Côté, J. Dorfan, A. M. Boyarski, B. N. Ratcliff, G. A. Cowan, R. G. Jacobsen, H. Marsiske, N. D. Qi, R. Schwierz, V. B. Koptchev, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, S. Ahmed, D. Gamba, S. Schrenk, Sai-Juan Chen, A. E. Blinov, C. C. Young, W. T. Meyer, E. Chen, Q. H. Guo, Ph Leruste, N. Arnaud, D. D. Altenburg, A. M. Lutz, D. Dujmic, B. Mayer, A. K. Yarritu, M. Bruinsma, W. J. Wisniewski, G. Marchiori, P. Kyberd, J. E. Sundermann, I. M. Peruzzi, Achille Stocchi, S. Passaggio, T. W. Beck, F. Bianchi, A. V. Gritsan, M. S. Gill, D. D. Brown, L. Zhang, A. E. Rubin, Roberto Covarelli, R. W. Kadel, A. Palano, D. Hufnagel, S. Schenk, Pu Wang, Marcello Rotondo, S. J. Gowdy, H. U. Flaecher, A. Zghiche, J. Kroseberg, G. Cavoto, R. J. Wilson, L. M. Cremaldi, S. K. Swain, D. G. Hitlin, P. Rankin, S. Ye, R. Ter-Antonyan, Nicola Neri, R. Barate, T. Schalk, F. Blanc, M. A. Mazzoni, G. Wormser, M. M. Macri, S. J. Sekula, C. Gatto, Mauro Morandin, A. J. Bevan, M. C. Hodgkinson, Sw. Banerjee, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, J. P. Coleman, F. Muheim, M. C. Simani, A. Jawahery, F. Anulli, S. D. Foulkes, S. Dittongo, G. Cibinetto, S. H. Robertson, S. Emery, V. Klose, S. Curry, B. Viaud, Nicolas Berger, W. Dunwoodie, D. A. Hopkins, S. M. Spanier, B. Franek, N. A. Roe, G. P. Dubois-Felsmann, P. Grenier, D. E. Hutchcroft, J. M. Bauer, A. P. Onuchin, C. Dallapiccola, Ch De La Vaissière, J. J. Hollar, H. R. Band, W. S. Lockman, Q. L. Zeng, H. B. Crawley, A. Chen, B. A. Petersen, C. L. Brown, M. R. Convery, G. Schott, G. Graziani, P. J. Oddone, M. Verderi, T. Hadig, Enrico Robutti, U. Mallik, H Koch, C. Cartaro, W. Roethel, J. Strube, L. Piemontese, E. Gabathuler, W. R. Innes, F. C. Porter, M. Zito, P. J. Clark, R. K. Mommsen, G. W. London, M. A. Mazur, R. J. Parry, E. Di Marco, D. H. Wright, C. Patrignani, A. Cunha, V. Tisserand, and A. W. Weidemann

Subjects
Semileptonic decay, Physics, Nuclear physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, CP violation, B meson, 010306 general physics, 01 natural sciences, Particle identification
Abstract

We search for the rare leptonic decay B^+ → τ^+ν_τ in a sample of 232 × 10^6 BB pairs collected with the BABAR detector at the SLAC PEP-II B-Factory. Signal events are selected by examining the properties of the B meson recoiling against the semileptonic decay B^- → D^9*0)l^-ν_ l. We find no evidence for a signal and set an upper limit on the branching fraction of B(B^+ → τ^+ν_τ)

Published
2006

36. Measurements of neutralBdecay branching fractions toKS0π+π−final states and the charge asymmetry ofB0→K*+π−

Author

I. M. Peruzzi, T. W. Beck, F. Bianchi, D. D. Brown, Janice Button-Shafer, G. R. Bonneaud, J. Dorfan, A. M. Boyarski, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, A. E. Rubin, Ph Leruste, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, D. Hufnagel, Pu Wang, A. W. Weidemann, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, M. Pappagallo, P. Grenier, A. B. Breon, A. Roodman, R. Bartoldus, D. E. Hutchcroft, J. M. Bauer, E. P. Solodov, C. Dallapiccola, Ch De La Vaissière, J. J. Hollar, S. E. Morgan, R. C. Field, F. Salvatore, H. J. Bulten, V. Eyges, Zongfu Yu, M. Dickopp, R. Liu, V. B. Golubev, H. P. Paar, S. H. Robertson, S. Emery, S. A. Majewski, A. Satpathy, G. Therin, T. Pulliam, M. J. Charles, V. Klose, J. E. Brau, Y. Karyotakis, H. R. Band, W. S. Lockman, M. M. Macri, P. Kim, S. J. Sekula, A. Jawahery, A. M. Eisner, S. D. Foulkes, Maurizio Pierini, T. S. Mattison, D. A. Sanders, Roland Waldi, F. Ferroni, G. Cibinetto, X. Giroux, Hui Li, W. Kozanecki, S. J. Gowdy, J. Stelzer, S. Pacetti, Herbert Koch, S. Curry, J. F. Hirschauer, G. Finocchiaro, V. Luth, Sergio Grancagnolo, A. Petzold, Q. L. Zeng, D. del Re, A. Gaidot, M. Fritsch, Peter Elmer, G. Wagner, B. Viaud, G. Hamel de Monchenault, R. S. Panvini, J. Schwiening, L. Li Gioi, Liliana Teodorescu, X. C. Lou, J. J. Walsh, P. Tan, M. S. Alam, A. M. Rahimi, T. E. Latham, M. R. Convery, John Allison, R. Barate, K. Peters, G. Schott, G. S. Abrams, A. Snyder, C. Hast, S. S. Hertzbach, Y. Groysman, A. N. Yushkov, A. P. Onuchin, L. Wilden, W. D. Hulsbergen, F. Bucci, D. N. Brown, J. A. Nash, M. Lo Vetere, C. K. Lae, G. P. Taylor, Sw. Banerjee, G. P. Gopal, Amanda Weinstein, D. J. Lange, M. Lu, Nicola Cavallo, G. Piredda, F. F. Wilson, G. Lynch, A. Chen, M. V. Purohit, A. Dvoretskii, G. Rizzo, J. Schubert, J. C. Chen, A. M. Eichenbaum, G. Graziani, P. J. Oddone, B. A. Petersen, C. L. Brown, B. T. Meadows, G. Raven, Davide Piccolo, M. L. Kocian, M. Morii, Bruce Mellado, Francesco Polci, D. A. Bowerman, Paul Fraser Harrison, M. J.J. John, S. B. Zain, A. V. Gritsan, Olga Igonkina, G. De Nardo, M. Pelizaeus, J. Chauveau, J. I. Yi, M. D. Sokoloff, C. M. Brown, W. A. Wenzel, H. B. Crawley, C. M. Hawkes, M. S. Gill, F. Di Lodovico, Bernard Aubert, W. T. Ford, M. Wittgen, V. E. Ozcan, C. M. Cormack, Tim Adye, C. Lu, D. Judd, F. Bellini, C. A. Heusch, A. K. Mohapatra, D. J. Payne, U. Nauenberg, C. J. Flacco, J. C. Dingfelder, R. D. Kass, Roberto Covarelli, R. W. Kadel, F. R. Wappler, M. Bondioli, Denis Bernard, V. Halyo, S. Otto, Sh. Rahatlou, R. R. Kofler, A. Palano, Mauro Morandin, A. J. Bevan, F. Blanc, Ch Yèche, James R. Wilson, W. Roethel, Julie Malcles, M. Krishnamurthy, N. De Groot, Jeffrey Richman, J. Strube, F. Muheim, P. M. Patel, M. G. Wilson, D. A. Roberts, L. Gladney, D. E. Wagoner, Yu. G. Kolomensky, A. A. Salnikov, S. Schenk, E. A. Kravchenko, A. J. Edwards, O. Hamon, G. Kukartsev, F. E. Taylor, J. A. Kadyk, Chunhui Chen, W. O. Ruddick, Gabriele Simi, C. Voci, C. H. Cheng, M. C. Hodgkinson, M. Steinke, K. Yi, A. Stocchi, R. N. Cahn, Mohamed H. Ahmed, T. Held, K. E. Ford, A. M. Lutz, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, L. Piemontese, Nicolas Berger, Hyun-Chul Kim, Maria Roberta Monge, A. Mihalyi, J. A. McKenna, F. Le Diberder, C. L. Davis, B. Spaan, S. F. Ganzhur, Crisostomo Sciacca, D. Aston, R. Gamet, D. A. Hopkins, S. M. Spanier, Stephen Robert Wagner, J.H. Panetta, J. P. Lees, E. Paoloni, A. Lazzaro, Marcella Bona, M. T. Graham, J. R. Fry, Roberto Calabrese, B. C. Shen, H. Briand, A. Oyanguren, J. Kroseberg, K. Suzuki, D. Su, P. Spradlin, U. Langenegger, D. Dong, A. D. Bukin, M. Haire, J. C. Williams, G. Cavoto, E. Gabathuler, K. R. Schubert, P. Lund, V. Poireau, X. R. Chen, M. T. Ronan, R. L. Flack, W. R. Innes, L. Lanceri, Stéphane Plaszczynski, A. Samuel, M. Pripstein, F. C. Porter, M. Piccolo, E. Won, J. Ocariz, M. Spitznagel, R. de Sangro, S. L. Wu, J. Brose, M. T. Allen, Y. S. Zhu, A. Calcaterra, B. N. Ratcliff, T. Glanzman, G. Eigen, G. Benelli, S. Brunet, N. D. Qi, F. Simonetto, W. F. Mader, R. H. Schindler, B. Dahmes, R. Schwierz, W. H. Toki, M. Carpinelli, R. F. Schwitters, D. Côté, Markus Cristinziani, M. Verderi, G. Batignani, J. R. Gaillard, T. J. Harrison, J. W. Gary, J. Libby, J. M. Thompson, Shanhui Fan, W. Menges, D. B. MacFarlane, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, T. Hadig, W. Gradl, J. Va'vra, K. Wang, M. T. Naisbit, Lydia Roos, M. Morganti, F. Safai Tehrani, P. C. Bloom, Michael Kelly, J. L. Ritchie, T. J. Orimoto, D. Fortin, T. Cuhadar-Donszelmann, Enrico Robutti, Silvano Tosi, H. Nicholson, J.J. Reidy, E. O. Olaiya, Paul Jackson, H. Marsiske, K. T. Flood, I. Kitayama, S. I. Serednyakov, F. X. Yumiceva, U. Mallik, C. Roat, L. Del Buono, L. T. Kerth, H. K. Hadavand, J. Marks, M. Zito, G. Blaylock, Patricia R. Burchat, R. S. Dubitzky, Martino Margoni, C. Cartaro, S. Saremi, R. Sacco, N. S. Knecht, C. Touramanis, M. A. Saeed, R. Kroeger, J. M. LoSecco, I. Eschrich, S. Bettarini, George Lafferty, G. A. Cowan, A. E. Blinov, C. C. Young, W. T. Meyer, Sai-Juan Chen, D. P. Stoker, H. L. Snoek, J. W. Berryhill, Bruce Schumm, P. J. Clark, Claudio Campagnari, N. R. Barlow, R. Claus, M. Bruinsma, R. Andreassen, N. B. Sinev, G. Mancinelli, Matteo Negrini, R. G. Jacobsen, Paul Kyberd, R. Cowan, R. Cenci, A. Zallo, F. Couderc, F. Palombo, Marcello Rotondo, Junqiao Wu, Vivek Sharma, Douglas Wright, Pierluigi Paolucci, Yuehong Xie, Y. P. Lau, R. K. Mommsen, D. Boutigny, A. T. Watson, H. U. Flaecher, A. Zghiche, I. J. Forster, N. Danielson, F. Galeazzi, R. Frey, F. Forti, K. Goetzen, R. J. Wilson, T. B. Moore, James D. Olsen, K. K. Gan, M. H. Kelsey, V. B. Koptchev, A. J.S. Smith, R. K. Yamamoto, T. Abe, A. J. Hart, Eleonora Luppi, I. Narsky, C. Hearty, A. Hocker, S. Ahmed, N. Van Bakel, D. Gamba, S. Schrenk, L. M. Cremaldi, R. Capra, E. A. Eckhart, L. Bosisio, D. J. Bard, G. W. London, Justin Albert, G. Grosdidier, D. J. Summers, A. Hauke, G. W. Morton, J. R. Johnson, B. G. Fulsom, S. Jayatilleke, H. Kagan, J. P. Burke, E. Torrence, Wp Vazquez, M. H. Schune, M. Pioppi, M. G. Green, U. Uwer, J. H. von Wimmersperg-Toeller, M. Battaglia, H. Schröder, S. Luitz, P. David, M. Saleem, T. Brandt, D. C. Williams, R. Stroili, H. A. Neal, M. A. Mazur, D. S. Best, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, E. Chen, Q. H. Guo, B. Stugu, M. Chao, D. Dujmic, R. J. Parry, S. K. Swain, E. Di Marco, L. Vitale, L. M. Mir, T. R. McMahon, T. Piatenko, F. Martinez-Vidal, Dominik Müller, B. Cheng, V. E. Blinov, M. Davier, G. Marchiori, A. Ryd, D. H. Wright, C. L. Edgar, P. S. Jackson, Pierre-Francois Giraud, A. Santroni, Virginia Azzolini, Kenji Hamano, S. Willocq, G. Della Ricca, C. Patrignani, A. Cunha, V. Lombardo, E. Grauges, C. T. Potter, S. Playfer, Q. K. Wong, V. Tisserand, Y. B. Pan, D. Monorchio, Mario Giorgi, M. Legendre, R. Kowalewski, S. Morganti, C. P. O'Grady, Sridhara Dasu, L.M. Zhang, Akram Khan, E. Feltresi, U. Egede, R. Godang, H. M. Lacker, G. W. Brandenburg, I. Ofte, Colin Jessop, M. A. Baak, G. Sciolla, R. Prepost, A. V. Telnov, H. W. Zhao, H. L. Lynch, P. D. Dauncey, R. Nogowski, J. M. Roney, R. Contri, D. G. Hitlin, P. Rankin, K. Koeneke, M. Barrett, Xiang Li, E. I. Rosenberg, C. T. Day, S. Ye, Brandon L. Hartfiel, J. P. Coleman, M. C. Simani, C. D. Buchanan, D. M. Strom, K. S. Chaisanguanthum, E. Charles, Fabio Cossutti, M. L. Perl, Maurizio Biasini, Luca Lista, F. Anulli, S. Dittongo, A. Olivas, T. C. Petersen, M. Weaver, D. Bettoni, J. T. Boyd, P. Patteri, R. Baldini-Ferroli, D. W. G. S. Leith, W. N. Cottingham, V. Lepeltier, Joseph Izen, R. Ter-Antonyan, Yu I. Skovpen, W. Bhimji, D. Kirkby, Mirco Andreotti, G. Vasseur, S. Rodier, Owen Rosser Long, A. Seiden, K. C. Schofield, Nicola Neri, M. Benayoun, G. B. Mohanty, J. A. Ernst, T. Schalk, K. A. George, M. A. Mazzoni, G. Calderini, G. Wormser, R. Eckmann, K. A. Ulmer, Francesco Fabozzi, G. Vasileiadis, P. Roudeau, M. Datta, R. Messner, G. Rong, V. Eschenburg, P. Taras, M. Gaspero, G. Nesom, A. Kreisel, Wouter Verkerke, Matteo Rama, J. G. Smith, J. J. Back, C. Gatto, Ch Thiebaux, S. Prell, H. Staengle, T. Schroeder, Jie Zhang, James H Cochran, B. Lewandowski, M. K. Sullivan, A. Soffer, A. D'Orazio, W. Dunwoodie, R. Aleksan, F. Gallo, B. Franek, N. A. Roe, G. P. Dubois-Felsmann, Corrado Angelini, T. M. Hong, B. Bhuyan, O. L. Buchmueller, M. B. Nikolich, V. P. Druzhinin, C. Bozzi, K. Honscheid, C. A. Chavez, A. Buzzo, R. J. Barlow, N. Chevalier, M. Posocco, M. Mandelkern, W. J. Wisniewski, J. E. Sundermann, and S. Passaggio

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, Maximum likelihood, Analytical chemistry, Branching (polymer chemistry), 01 natural sciences, Asymmetry, Particle identification, B-factory, Nuclear physics, Particle decay, 0103 physical sciences, Pi, 010306 general physics, media_common
Abstract

Branching fraction measurements using B-meson decays to Kspi+pi- are presented. These measurements were obtained by analyzing a data sample of 88.9 million Y(4S) --> BB decays collected with the BaBar detector at the SLAC PEP-II asymmetric-energy B factory. Using a maximum likelihood fit, the following branching fraction results were obtained: Br(B0 -> K0pi+pi- = (43.7 +/- 3.8 +/- 3.4) * 10^-6, Br(B0 --> K{*+}pi-) = (12.9 +/- 2.4 +/- 1.4) * 10$^-6} and Br(B0 --> D-(--> Kspi-)pi+ = (42.7 +/- 2.1 +/- 2.2) * 10^{-6}. The CP violating char ge asymmetry A(K*pi} for the decay B0 --> $K{*+}pi-$ was measured to be A(K*pi} = 0.23 +/- $0.18^{+0.09}_{-0.06}$. For all these measurements the first error is statistical and the second is systematic.

Published
2006

37. Search for Lepton Flavor Violation in the Decayτ±→e±γ

Author

R. Bartoldus, A. K. Mohapatra, D. J. Payne, W. Roethel, U. Nauenberg, S. Bettarini, J. Strube, V. Eyges, A. J. Edwards, Zongfu Yu, M. J. Charles, L. Piemontese, George Lafferty, A. W. Weidemann, Hyun-Chul Kim, A. Samuel, D. del Re, H. J. Bulten, Silvano Tosi, E. Gabathuler, J. A. Nash, W. R. Innes, F. C. Porter, M. Lo Vetere, T. B. Moore, K. Suzuki, J. S. Minamora, R. C. Field, F. Salvatore, J. F. Hirschauer, G. Finocchiaro, V. Luth, M. Spitznagel, M. S. Alam, B. N. Ratcliff, A. N. Yushkov, Francesco Polci, A. Snyder, F. F. Wilson, M. Pelizaeus, J. Chauveau, A. Satpathy, V. Halyo, L. Gladney, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, F. Le Diberder, M. G. Wilson, D. A. Roberts, F. E. Taylor, C. M. Cormack, M. Bondioli, F. Bellini, James R. Wilson, T. Held, K. E. Ford, O. Hamon, S. J. Gowdy, D. Monorchio, A. Hauke, Mauro Morandin, A. J. Bevan, H. Nicholson, N. D. Qi, R. Schwierz, F. Muheim, M. Steinke, K. Yi, Marcella Bona, J. D. Richman, A. M. Lutz, M. T. Graham, Denis Bernard, M. M. Macri, R. Barate, Sw. Banerjee, Ch Yèche, Roberto Calabrese, B. C. Shen, H. Schröder, Roger Barlow, Martino Margoni, M. Fritsch, A. Lazzaro, D. Su, M. Zito, A. E. Blinov, C. C. Young, W. T. Meyer, Matteo Rama, S. Otto, B. Spaan, H. Briand, A. D. Bukin, L. Lanceri, Stéphane Plaszczynski, S. S. Hertzbach, Mohamed H. Ahmed, T. J. Orimoto, D. Fortin, J. Marks, G. A. Cowan, Y. Groysman, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, G. Kukartsev, Colin Jessop, R. Prepost, L. Wilden, S. Luitz, D. C. Williams, U. Langenegger, G. Lynch, H. W. Zhao, P. D. Dauncey, Nicolas Berger, V. Poireau, Michael Kelly, A. Stocchi, J. A. Kadyk, Chunhui Chen, J. L. Ritchie, S. J. Sekula, A. Jawahery, S. D. Foulkes, G. Cibinetto, D. A. Hopkins, S. M. Spanier, R. Godang, H. B. Crawley, M. Chao, Kenji Hamano, G. Mancinelli, R. N. Cahn, P. Kim, Maria Roberta Monge, A. Mihalyi, T. Glanzman, H. Kagan, M. Saleem, R. Nogowski, Bruce Schumm, G. Eigen, F. Safai Tehrani, H. M. Lacker, H. L. Lynch, R. F. Schwitters, D. B. MacFarlane, H. P. Paar, J. E. Brau, J. Ocariz, X. Giroux, R. K. Yamamoto, D. Dong, M. G. Green, E. Won, P. J. Clark, K. Goetzen, Y. S. Zhu, E. Paoloni, M. L. Kocian, W. A. Wenzel, J. Libby, Mirco Andreotti, P. Spradlin, Xiang Li, C. D. Buchanan, X. R. Chen, F. Bucci, M. T. Ronan, K. Wang, S. Prell, M. Barrett, Jie Zhang, James H Cochran, D. M. Strom, B. Lewandowski, K. S. Chaisanguanthum, M. Verderi, S. Playfer, A. P. Onuchin, A. Olivas, M. Weaver, R. K. Mommsen, Jim McKenna, J. Stelzer, M. Piccolo, M. T. Allen, G. Batignani, W. Gradl, C. P. O'Grady, M. Mandelkern, G. W. Brandenburg, R. Contri, I. Eschrich, J. R. Gaillard, G. W. London, A. B. Breon, R. Baldini-Ferroli, T. J. Harrison, J. W. Gary, M. Davier, W. Bhimji, D. Kirkby, G. Vasseur, J. P. Burke, E. Torrence, P. David, T. Schalk, J. C. Dingfelder, S. E. Morgan, T. Hadig, I. Kitayama, H. K. Hadavand, Corrado Angelini, R. G. Jacobsen, Claudio Campagnari, E. Charles, Fabio Cossutti, D. Bettoni, R. Frey, M. H. Kelsey, V. Lombardo, J. P. Lees, A. Soffer, W. M. Bugg, D. Kovalskyi, M. Dickopp, M. Legendre, Alberto Lusiani, John Allison, A. J. Hart, M. A. Mazur, J. Schubert, Davide Piccolo, K. C. Schofield, A. Chen, B. A. Petersen, C. L. Brown, J. Va'vra, D. Côté, Akram Khan, V. B. Koptchev, Enrico Robutti, Yu I. Skovpen, U. Mallik, B. Bhuyan, R. J. Parry, M. A. Baak, A. Hocker, C. Hearty, A. V. Telnov, E. A. Eckhart, D. J. Summers, K. Koeneke, J. Schwiening, B. T. Meadows, G. Raven, L. Bosisio, T. Abe, V. Lepeltier, M. Pappagallo, J. I. Yi, M. Benayoun, E. Di Marco, D. H. Wright, M. A. Mazzoni, S. Ahmed, G. Wormser, N. Van Bakel, D. Gamba, J. W. Berryhill, F. Gallo, A. Santroni, R. Cenci, S. Schrenk, Virginia Azzolini, Yu. G. Kolomensky, M. D. Sokoloff, C. M. Brown, Liliana Teodorescu, X. C. Lou, J. J. Walsh, B. G. Fulsom, J.J. Reidy, C. Cartaro, C. Patrignani, A. Cunha, V. Tisserand, O. L. Buchmueller, F. Forti, L. Li Gioi, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, L. Vitale, A. M. Rahimi, T. E. Latham, P. R. Burchat, U. Egede, V. Ziegler, W. Panduro Vazquez, A. Zallo, F. Couderc, J. R. Johnson, F. Martinez-Vidal, Dominik Müller, S. Ricciardi, M. J.J. John, R. Aleksan, S. B. Zain, E. Chen, Q. H. Guo, B. Stugu, Q. K. Wong, V. P. Druzhinin, C. Bozzi, J. M. Thompson, R. Andreassen, G. Sciolla, H. Marsiske, G. S. Abrams, G. De Nardo, D. N. Brown, Alexis Pompili, Tetiana Hryn'ova, P. Lund, R. L. Flack, R. R. Kofler, J. Brose, A. Calcaterra, M. Krishnamurthy, R. S. Dubitzky, C. Gatto, D. Dujmic, K. T. Flood, Nicola Cavallo, F. Simonetto, V. E. Ozcan, W. F. Mader, G. Marchiori, D. E. Wagoner, R. H. Schindler, Shanhui Fan, W. Menges, K. Honscheid, W. O. Ruddick, C. Lu, D. Judd, C. J. Flacco, A. Kreisel, Paul Jackson, M. L. Perl, P. C. Bloom, S. Saremi, Gabriele Simi, R. Sacco, J. T. Boyd, C. A. Chavez, J. M. LoSecco, P. Grenier, D. E. Hutchcroft, J. M. Bauer, Janice Button-Shafer, H. L. Snoek, R. Kroeger, C. L. Davis, C. Dallapiccola, A. Buzzo, C. Roat, Ch De La Vaissière, D. Boutigny, A. T. Watson, D. P. Stoker, Pierluigi Paolucci, Joseph Izen, V. B. Golubev, Yuehong Xie, A. Roodman, Olga Igonkina, Maurizio Biasini, R. Gamet, N. Danielson, F. Galeazzi, J. J. Hollar, G. R. Bonneaud, N. S. Knecht, J. Dorfan, S. F. Ganzhur, H. R. Band, W. T. Ford, T. Schroeder, R. Claus, Sai-Juan Chen, N. B. Sinev, M. Haire, J. C. Williams, T. S. Mattison, D. A. Sanders, Eleonora Luppi, Y. P. Lau, P. Tan, A. J.S. Smith, G. Therin, Tim Adye, R. D. Kass, T. Pulliam, N. Chevalier, A. M. Boyarski, W. S. Lockman, Matteo Negrini, M. Posocco, Douglas Wright, T. M. Hong, Roland Waldi, Q. L. Zeng, Paul Kyberd, Maurizio Pierini, M. Bruinsma, W. J. Wisniewski, Justin Albert, K. K. Gan, I. J. Forster, F. Ferroni, S. A. Majewski, E. J. Hill, C. Hast, D. J. Lange, G. Piredda, P. E. Kutter, P. K. Behera, T. Allmendinger, A. Dvoretskii, J. C. Chen, J. E. Sundermann, M. R. Convery, Ph Leruste, N. Arnaud, B. Dahmes, D. D. Altenburg, M. Morii, D. A. Bowerman, Paul Fraser Harrison, R. Capra, Owen Rosser Long, C. K. Lae, A. Seiden, F. R. Wappler, L. Del Buono, D. J. Bard, G. Rizzo, B. Mayer, A. K. Yarritu, R. Eckmann, Sh. Rahatlou, S. Passaggio, Y. Karyotakis, P. M. Patel, G. B. Mohanty, W. Dunwoodie, Stephen Robert Wagner, J.H. Panetta, I. M. Peruzzi, P. J. Oddone, J. A. Ernst, X. Chai, M. H. Schune, U. Uwer, M. Battaglia, K. R. Schubert, S. Pacetti, A. V. Gritsan, R. Bula, T. Cuhadar-Donszelmann, R. Cowan, C. Touramanis, T. W. Beck, S. I. Serednyakov, F. Bianchi, M. S. Gill, D. D. Brown, P. Roudeau, M. Datta, G. Grosdidier, A. E. Rubin, B. Franek, I. Narsky, D. S. Best, Roberto Covarelli, R. W. Kadel, A. Palano, T. Brandt, R. Stroili, H. A. Neal, D. Hufnagel, Pu Wang, S. Schenk, Wouter Verkerke, J. J. Back, Ch Thiebaux, K. A. Ulmer, N. A. Roe, G. P. Dubois-Felsmann, C. M. Hawkes, J. Kroseberg, G. Cavoto, A. Ryd, H. Staengle, L. M. Mir, T. R. McMahon, T. Piatenko, A. A. Salnikov, S. Willocq, Marcello Rotondo, Francesco Fabozzi, G. Vasileiadis, H. U. Flaecher, A. Zghiche, R. J. Wilson, L. M. Cremaldi, R. Messner, G. Della Ricca, Y. B. Pan, G. Rong, V. Eschenburg, E. Grauges, C. T. Potter, Mario Giorgi, S. K. Swain, R. Kowalewski, P. Taras, E. P. Solodov, L.M. Zhang, D. G. Hitlin, S. Ye, S. Morganti, T. C. Petersen, R. Ter-Antonyan, S. Rodier, M. Gaspero, G. Nesom, Nicola Neri, I. Ofte, Sridhara Dasu, E. Feltresi, C. A. Heusch, S. H. Robertson, V. Klose, Herbert Koch, S. Curry, E. A. Kravchenko, B. Viaud, A. Oyanguren, C. Voci, P. Patteri, N. De Groot, C. H. Cheng, Crisostomo Sciacca, D. Aston, J. R. Fry, M. K. Sullivan, A. D'Orazio, F. Blanc, M. C. Hodgkinson, G. Graziani, R. de Sangro, S. L. Wu, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, J. P. Coleman, M. C. Simani, F. Anulli, S. Dittongo, S. Brunet, W. H. Toki, Markus Cristinziani, R. Liu, W. Kozanecki, F. X. Yumiceva, A. M. Eisner, Hui Li, Sergio Grancagnolo, G. Blaylock, A. Petzold, G. Hamel de Monchenault, M. Pioppi, B. Cheng, V. E. Blinov, C. L. Edgar, R. S. Panvini, W. D. Hulsbergen, M. V. Purohit, Peter Elmer, G. Wagner, Bruce Mellado, D. W. G. S. Leith, W. N. Cottingham, M. Wittgen, G. Schott, G. Calderini, K. Peters, Julie Malcles, M. Lu, M. Pripstein, A. M. Eichenbaum, G. Benelli, E. O. Olaiya, M. A. Saeed, N. R. Barlow, F. Palombo, Junqiao Wu, Vivek Sharma, James D. Olsen, L. T. Kerth, P. S. Jackson, J. M. Roney, Luca Lista, K. A. George, J. G. Smith, M. B. Nikolich, A. Gaidot, G. P. Gopal, Amanda Weinstein, S. Emery, F. Di Lodovico, and Bernard Aubert

Subjects
Physics, Particle physics, Annihilation, 010308 nuclear & particles physics, Branching fraction, General Physics and Astronomy, Supersymmetry, Electron, 01 natural sciences, Particle decay, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, 010306 general physics, Energy (signal processing), Lepton
Abstract

A search for the non-conservation of lepton flavor in the decay {tau}{sup {+-}} {yields} e{sup {+-}}{gamma} has been performed with 2.07 x 10{sup 8} e{sup +}e{sup -} {yields} {tau}{sup +}{tau}{sup -} events collected by the BABAR detector at the PEP-II storage ring at a center-of-mass energy near 10.58 GeV. They find no evidence for a signal and set an upper limit on the branching ratio of {Beta}({tau}{sup {+-}} {yields} e{sup {+-}}{gamma}) < 1.1 x 10{sup -7} at 90% confidence level.

Published
2006

38. Study of theX(3872)andY(4260)inB0→J/ψπ+π−K0andB−→J/ψπ+π−K−decays

Author

C. Hearty, E. A. Eckhart, D. J. Summers, B. G. Fulsom, A. W. Weidemann, K. T. Flood, S. Saremi, R. Sacco, H. J. Bulten, A. Gaidot, H. L. Snoek, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, Yuehong Xie, G. P. Gopal, Amanda Weinstein, A. N. Yushkov, L. Vitale, F. Martinez-Vidal, Dominik Müller, Y. P. Lau, A. J.S. Smith, E. P. Solodov, Q. K. Wong, M. Legendre, E. Luppi, John Allison, R. Cenci, A. Zallo, V. Halyo, J. Schubert, S. Bettarini, V. Lombardo, F. Di Lodovico, H. Kagan, Bernard Aubert, Davide Piccolo, T. Schalk, M. Saleem, A. K. Mohapatra, D. J. Payne, U. Nauenberg, P. J. Clark, M. A. Mazzoni, A. B. Breon, James R. Wilson, R. Godang, M. Steinke, K. Yi, F. Winklmeier, Mohamed H. Ahmed, V. E. Ozcan, M. G. Wilson, F. Couderc, G. Wormser, U. Langenegger, S. Playfer, G. Eigen, H. M. Lacker, F. Safai Tehrani, T. Held, K. E. Ford, C. P. O'Grady, A. Samuel, H. L. Lynch, Akram Khan, M. A. Baak, Silvano Tosi, C. Gatto, P. C. Bloom, D. A. Roberts, F. E. Taylor, G. Grosdidier, L. Gladney, N. S. Knecht, T. B. Moore, A. V. Telnov, K. Koeneke, S. E. Morgan, R. C. Field, F. Salvatore, M. T. Graham, T. Schroeder, Ch Yèche, R. Capra, M. Barrett, G. W. Morton, M. H. Schune, U. Egede, U. Uwer, R. Faccini, J. Biesiada, T. Brandt, D. M. Strom, K. S. Chaisanguanthum, R. Stroili, H. A. Neal, G. Sciolla, A. Hauke, A. Ryd, F. Ferrarotto, A. J. Lankford, F. Le Diberder, R. K. Mommsen, A. Satpathy, G. Kukartsev, E. Charles, Fabio Cossutti, M. Dickopp, J. F. Hirschauer, G. Finocchiaro, V. Luth, A. Kreisel, W. Dunwoodie, R. N. Cahn, Marcella Bona, Justin Albert, M. S. Alam, T. Glanzman, R. F. Schwitters, M. L. Perl, P. S. Jackson, B. C. Shen, J. Schwiening, Maria Roberta Monge, B. Franek, S. Jayatilleke, Liliana Teodorescu, Yu I. Skovpen, Bruce Schumm, L. Li Gioi, A. Snyder, A. Mihalyi, X. C. Lou, J. J. Walsh, J. A. McKenna, D. B. MacFarlane, D. Monorchio, G. W. London, N. A. Roe, G. P. Dubois-Felsmann, J. Stelzer, J. T. Boyd, Joseph Izen, F. F. Wilson, J. M. Roney, F. Simonetto, A. M. Rahimi, T. E. Latham, L. Del Buono, W. F. Mader, Michael Kelly, J. L. Ritchie, R. H. Schindler, V. Lepeltier, H. P. Paar, J. E. Brau, M. Fritsch, S. S. Hertzbach, Y. Groysman, Shanhui Fan, W. Menges, E. Paoloni, R. Frey, T. S. Mattison, D. A. Sanders, M. A. Mazur, R. J. Parry, Marcello Rotondo, E. Di Marco, M. H. Kelsey, M. Benayoun, T. J. Orimoto, D. Fortin, Luca Lista, Colin Jessop, M. Macri, G. P. Taylor, P. Spradlin, X. R. Chen, G. S. Abrams, R. Prepost, D. Côté, H. U. Flaecher, A. Zghiche, R. J. Wilson, H. W. Zhao, P. Tan, L. T. Kerth, D. H. Wright, R. Eckmann, M. Carpinelli, J. Marks, D. N. Brown, W. M. Bugg, D. Kovalskyi, M. T. Naisbit, Lydia Roos, Nicola Cavallo, L. Wilden, M. Morganti, X. Giroux, G. Lynch, R. Nogowski, T. Abe, B. T. Meadows, M. T. Ronan, C. Patrignani, C. Hast, D. J. Lange, G. Piredda, A. Cunha, J. Ocariz, A. Dvoretskii, V. Tisserand, L. M. Cremaldi, K. A. George, J. G. Smith, G. Raven, J. I. Yi, M. D. Sokoloff, C. M. Brown, P. D. Dauncey, A. J. Hart, Alberto Lusiani, Xiang Li, C. D. Buchanan, S. Otto, J. C. Chen, S. J. Gowdy, M. L. Kocian, G. A. Cowan, I. Kitayama, S. I. Serednyakov, H. Schröder, M. Pappagallo, M. J.J. John, S. B. Zain, Mirco Andreotti, M. Morii, J. R. Johnson, W. A. Wenzel, G. D. Lafferty, M. B. Nikolich, S. K. Swain, T. J. Harrison, J. W. Gary, J. Va'vra, S. Luitz, L. Bosisio, R. Bartoldus, R. Kroeger, D. Boutigny, J. Chauveau, K. A. Ulmer, A. Olivas, M. Weaver, L.M. Zhang, R. Barate, V. Eyges, Zongfu Yu, D. C. Williams, R. G. Jacobsen, A. T. Watson, M. Chao, R. Baldini-Ferroli, F. R. Wappler, Olga Igonkina, V. B. Golubev, Sw. Banerjee, Sh. Rahatlou, B. Spaan, R. K. Yamamoto, Kenji Hamano, J.J. Reidy, M. J. Charles, C. M. Cormack, M. Bondioli, D. del Re, W. Bhimji, D. Kirkby, D. G. Hitlin, P. Rankin, G. De Nardo, H. Briand, C. Lu, D. Judd, G. Vasseur, P. Grenier, D. E. Hutchcroft, J. M. Bauer, M. Mandelkern, V. B. Koptchev, Jeffrey Richman, Yu. G. Kolomensky, R. R. Kofler, M. Krishnamurthy, W. T. Ford, K. C. Schofield, Tim Adye, R. D. Kass, Maurizio Biasini, A. D. Bukin, D. E. Wagoner, H. B. Crawley, W. O. Ruddick, S. Ye, S. Ahmed, H. Marsiske, M. G. Green, H. K. Hadavand, L. Lanceri, G. Therin, Stéphane Plaszczynski, Denis Bernard, R. S. Dubitzky, J. A. Nash, D. S. Best, T. C. Petersen, J. M. LoSecco, M. Spitznagel, R. Ter-Antonyan, Gabriele Simi, N. Van Bakel, D. Gamba, S. Schrenk, Francesco Fabozzi, L. M. Mir, T. R. McMahon, T. Piatenko, G. W. Brandenburg, W. Roethel, J. Strube, R. Contri, C. L. Davis, R. Gamet, B. N. Ratcliff, Maurizio Pierini, G. Vasileiadis, C. Dallapiccola, Ch De La Vaissière, Owen Rosser Long, I. M. Peruzzi, M. Lo Vetere, J. A. Kadyk, Corrado Angelini, N. D. Qi, M. Davier, R. Schwierz, Francesco Polci, Nicola Neri, C. J. Flacco, A. Seiden, N. B. Sinev, A. J. Edwards, P. Lund, R. L. Flack, E. Grauges, Sai-Juan Chen, C. T. Potter, Mario Giorgi, J. Brose, A. M. Lutz, L. Piemontese, G. B. Mohanty, Hyun-Chul Kim, R. Messner, B. Bhuyan, E. Chen, Q. H. Guo, B. Stugu, Chunhui Chen, T. Cuhadar-Donszelmann, M. Haire, J. C. Williams, G. Rong, C. Touramanis, J. A. Ernst, S. A. Majewski, M. Pelizaeus, O. L. Buchmueller, A. Calcaterra, S. Morganti, K. Suzuki, V. Eschenburg, E. Gabathuler, A. Roodman, Sridhara Dasu, W. R. Innes, F. C. Porter, D. Dujmic, G. Marchiori, D. Dong, A. E. Blinov, C. C. Young, M. Datta, J. J. Hollar, T. Pulliam, F. Bellini, Wouter Verkerke, W. T. Meyer, V. P. Druzhinin, C. Bozzi, M. Bruinsma, W. J. Wisniewski, Y. Karyotakis, T. W. Beck, F. Bianchi, P. Kyberd, J. E. Sundermann, D. D. Brown, A. E. Rubin, O. Hamon, C. K. Lae, J. J. Back, G. Rizzo, Ch Thiebaux, P. Taras, C. Roat, E. Feltresi, Roland Waldi, F. Ferroni, E. Won, K. Honscheid, D. P. Stoker, C. A. Chavez, Y. S. Zhu, B. Dahmes, J. W. Berryhill, G. Williams, J. R. Gaillard, R. Andreassen, H. Staengle, H. Nicholson, J. Libby, M. Zito, P. Kim, Patricia R. Burchat, Martino Margoni, R. Claus, A. Buzzo, H. R. Band, D. A. Bowerman, R. J. Barlow, Paul Fraser Harrison, S. Passaggio, K. Wang, N. Chevalier, M. Posocco, Matteo Negrini, Douglas Wright, A. Stocchi, A. Lazzaro, S. Willocq, G. Della Ricca, G. Mancinelli, F. Bucci, M. Gaspero, G. Nesom, P. M. Patel, D. Hufnagel, I. J. Forster, I. Eschrich, Y. B. Pan, K. Goetzen, R. Kowalewski, C. M. Hawkes, Pu Wang, Matteo Rama, Stephen Robert Wagner, J.H. Panetta, K. R. Schubert, Claudio Campagnari, D. J. Bard, J. P. Lees, J. P. Burke, E. Torrence, D. Su, V. Poireau, S. Prell, M. Piccolo, P. David, Jie Zhang, A. A. Salnikov, James H Cochran, S. Pacetti, R. Cowan, S. J. Sekula, A. Jawahery, S. D. Foulkes, G. Cibinetto, W. S. Lockman, B. Lewandowski, I. Ofte, Pierluigi Paolucci, F. Forti, J. H. von Wimmersperg-Toeller, M. Battaglia, R. Calabrese, N. Danielson, F. Galeazzi, J. C. Dingfelder, A. Soffer, P. Roudeau, Janice Button-Shafer, I. Narsky, Pierre-Francois Giraud, A. Santroni, Virginia Azzolini, M. T. Allen, S. Rodier, R. Aleksan, F. Gallo, J. M. Thompson, G. R. Bonneaud, J. Dorfan, A. P. Onuchin, A. Chen, B. A. Petersen, C. L. Brown, Paul Jackson, K. K. Gan, G. Batignani, W. Gradl, T. M. Hong, A. V. Gritsan, M. S. Gill, A. M. Boyarski, Roberto Covarelli, R. W. Kadel, A. Palano, Q. L. Zeng, D. Bettoni, S. Schenk, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, J. Kroseberg, G. Cavoto, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, F. Blanc, M. R. Convery, G. Schott, G. Graziani, P. J. Oddone, M. C. Hodgkinson, A. Oyanguren, M. Verderi, T. Hadig, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, Enrico Robutti, J. P. Coleman, M. C. Simani, F. Anulli, U. Mallik, C. Cartaro, S. Dittongo, P. Patteri, C. A. Heusch, Mauro Morandin, A. J. Bevan, F. Muheim, E. A. Kravchenko, C. Voci, Nicolas Berger, D. A. Hopkins, S. M. Spanier, S. F. Ganzhur, Crisostomo Sciacca, D. Aston, M. K. Sullivan, N. De Groot, A. D'Orazio, C. H. Cheng, A. Höcker, Peter Elmer, G. Wagner, S. H. Robertson, J. R. Fry, S. Emery, V. Klose, K. Peters, Herbert Koch, S. Curry, R. Liu, R. de Sangro, S. L. Wu, M. Lu, B. Viaud, S. Brunet, A. M. Eichenbaum, W. H. Toki, W. Kozanecki, A. M. Eisner, Hui Li, Julie Malcles, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, W. D. Hulsbergen, M. Pripstein, G. Benelli, M. V. Purohit, Bruce Mellado, M. Wittgen, E. O. Olaiya, M. A. Saeed, N. R. Barlow, F. Palombo, Junqiao Wu, Vivek Sharma, James D. Olsen, Markus Cristinziani, Wp Vazquez, M. Pioppi, F. X. Yumiceva, B. Cheng, V. E. Blinov, C. L. Edgar, G. Blaylock, D. W. G. S. Leith, W. N. Cottingham, G. Calderini, S. Ricciardi, Alexis Pompili, and Tetiana Hryn'ova

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Crystallography, Particle decay, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Resonance, 010306 general physics, 01 natural sciences, X(3872)
Abstract

We present results of a search for the X(3872) in B{sup 0}{yields}X(3872)K{sub S}{sup 0},X(3872){yields}J/{psi}{pi}{sup +}{pi}{sup -}, improved measurements of B{sup -}{yields}X(3872)K{sup -}, and a study of the J/{psi}{pi}{sup +}{pi}{sup -} mass region above the X(3872). We use 232x10{sup 6} BB pairs collected at the {upsilon}(4S) resonance with the BABAR detector at the PEP-II e{sup +}e{sup -} asymmetric-energy storage rings. The results include the 90% confidence interval 1.34x10{sup -6}

Published
2006

39. Measurements of the Absolute Branching Fractions of B±→K±Xcc̅

Author

T. Schalk, H. J. Bulten, G. W. London, A. B. Breon, M. A. Mazzoni, G. Wormser, P. Grenier, A. N. Yushkov, D. E. Hutchcroft, J. M. Bauer, C. Dallapiccola, Ch De La Vaissière, C. Gatto, S. E. Morgan, M. Dickopp, M. Legendre, F. Di Lodovico, J. J. Hollar, S. F. Ganzhur, H. R. Band, T. Schroeder, J. Stelzer, Bernard Aubert, J. Schwiening, Liliana Teodorescu, W. S. Lockman, A. K. Mohapatra, D. J. Payne, E. P. Solodov, U. Nauenberg, X. C. Lou, J. J. Walsh, S. Willocq, G. Della Ricca, Matteo Rama, A. M. Rahimi, T. E. Latham, A. M. Eisner, Hui Li, T. Held, K. E. Ford, S. Otto, W. Dunwoodie, Q. L. Zeng, Y. B. Pan, John Allison, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, B. T. Meadows, G. Raven, B. Franek, R. Kowalewski, A. Samuel, G. S. Abrams, D. N. Brown, S. Prell, W. D. Hulsbergen, M. V. Purohit, J. I. Yi, M. D. Sokoloff, C. M. Brown, N. A. Roe, G. P. Dubois-Felsmann, Bruce Mellado, V. Halyo, Jie Zhang, James H Cochran, B. Lewandowski, S. Pacetti, R. Cowan, M. R. Convery, N. De Groot, Silvano Tosi, C. H. Cheng, M. Wittgen, J. R. Fry, H. P. Paar, J. E. Brau, Bruce Schumm, R. de Sangro, S. L. Wu, S. Brunet, W. H. Toki, O. Hamon, J. Schubert, Davide Piccolo, B. Spaan, A. Soffer, F. Gallo, I. Narsky, P. J. Oddone, F. Simonetto, I. Ofte, X. Giroux, R. Bula, T. Cuhadar-Donszelmann, H. Briand, A. D. Bukin, W. F. Mader, R. H. Schindler, P. J. Clark, Marcello Rotondo, H. U. Flaecher, A. Zghiche, C. Touramanis, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, P. S. Jackson, V. E. Ozcan, P. C. Bloom, L. Gladney, A. J. Hart, K. T. Flood, R. Faccini, R. J. Wilson, L. M. Cremaldi, L. Lanceri, Stéphane Plaszczynski, M. Verderi, A. Lazzaro, D. Su, Shanhui Fan, V. Lombardo, W. Menges, Michael Kelly, V. Poireau, J. S. Minamora, N. S. Knecht, R. C. Field, F. Salvatore, Jeffrey Richman, J. Chauveau, G. Grosdidier, L. Bosisio, Yu. G. Kolomensky, S. K. Swain, T. M. Hong, R. Contri, S. Saremi, M. Pioppi, Paul Kyberd, Corrado Angelini, B. Bhuyan, R. Sacco, T. 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Subjects
Physics, Meson, 010308 nuclear & particles physics, Branching fraction, Particle physics, General Physics and Astronomy, Elementary particle, 01 natural sciences, HEP, Lower limit, High energy physic, Combinatorics, Two-body decay, BaBar, 0103 physical sciences, Absolute branching fraction, Física de partícules, Experiments, 010306 general physics, Charmonium
Abstract

We study the two-body decays of ${B}^{\ifmmode\pm\else\textpm\fi{}}$ mesons to ${K}^{\ifmmode\pm\else\textpm\fi{}}$ and a charmonium state ${X}_{c\overline{c}}$ in a sample of $210.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data from the BABAR experiment. We perform measurements of absolute branching fractions $\mathcal{B}({B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}{X}_{c\overline{c}})$ using a missing mass technique, and report several new or improved results. In particular, the upper limit $\mathcal{B}\mathbf{(}{B}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{K}^{\ifmmode\pm\else\textpm\fi{}}X(3872)\mathbf{)}l3.2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ at 90% C.L. and the inferred lower limit $\mathcal{B}\mathbf{(}X(3872)\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\mathbf{)}g4.2%$ will help in understanding the nature of the recently discovered $X(3872)$.

Published
2006

40. Search for theW-exchange decaysB0→Ds(*)−Ds(*)+

Author

S. J. Gowdy, R. Barate, Sw. Banerjee, S. Prell, V. Eyges, Zongfu Yu, M. J. Charles, R. Liu, W. Roethel, Michael T Ronan, J. Strube, L. Piemontese, A. Roodman, E. Gabathuler, W. R. Innes, F. C. Porter, Natalie A. Roe, Colin Jessop, H. B. Crawley, H. Kagan, M. Spitznagel, S. A. Majewski, R. Godang, H. M. Lacker, H. L. Lynch, Jie Zhang, James H Cochran, B. N. Ratcliff, P. J. Clark, D. del Re, M. Saleem, R. K. Mommsen, Toyoko Orimoto, M. A. Mazur, R. J. Parry, E. Di Marco, D. H. Wright, S. Playfer, Michael Kelly, C. Patrignani, A. Cunha, V. Tisserand, R. Prepost, J. P. Lees, R. Nogowski, W. Kozanecki, R. G. Jacobsen, M. Barrett, N. D. Qi, R. Schwierz, J. A. Nash, M. Lo Vetere, B. Lewandowski, A. Soffer, F. Gallo, Maurizio Biasini, J. L. Ritchie, James R. Wilson, I. Kitayama, S. I. Serednyakov, M. Steinke, K. Yi, T. Pulliam, Roland Waldi, F. Ferroni, Xiang Li, M. J.J. John, R. Aleksan, S. B. Zain, A. J. Edwards, D. M. Strom, K. S. Chaisanguanthum, Y. Karyotakis, E. Charles, Fabio Cossutti, J. M. Roney, Marcello Rotondo, Luca Lista, D. A. Bowerman, M. Pioppi, H. P. Paar, J. E. Brau, Francesco Polci, Owen Rosser Long, H. Schröder, S. Luitz, D. C. Williams, C. D. Buchanan, Marco Battaglia, G. De Nardo, C. P. O'Grady, Akram Khan, M. A. Baak, A. V. Telnov, K. Koeneke, J. M. Thompson, B. Cheng, V. E. Blinov, Bruce Schumm, J. A. Kadyk, Mohamed H. Ahmed, K. A. George, J. G. Smith, C. M. Hawkes, A. M. Eisner, Hui Li, Hyun-Chul Kim, C. L. Edgar, R. R. Kofler, M. Krishnamurthy, Sergio Grancagnolo, A. Petzold, Paul Fraser Harrison, A. Seiden, G. B. Mohanty, J. A. Ernst, M. Chao, A. Kreisel, H. U. Flaecher, A. Zghiche, R. J. Wilson, L. M. Cremaldi, S. Ahmed, N. Van Bakel, D. Gamba, I. M. Peruzzi, A. Olivas, M. Weaver, C. Lu, D. Judd, Paul Jackson, D. Bettoni, Yu I. Skovpen, M. Zito, M. B. Nikolich, S. Pacetti, D. Best, T. M. Hong, M. Pelizaeus, R. Cowan, X. Giroux, F. Bellini, D. E. Wagoner, H. K. Hadavand, W. O. Ruddick, Gabriele Simi, P. M. Patel, C. L. Davis, R. Gamet, S. Schrenk, K. Suzuki, C. J. Flacco, M. Datta, R. Baldini-Ferroli, W. Bhimji, D. Kirkby, F. Simonetto, W. F. Mader, R. H. Schindler, A. A. Salnikov, D. W. G. S. Leith, Stephen Robert Wagner, J.H. Panetta, G. Hamel de Monchenault, R. S. Panvini, Wouter Verkerke, X. Chai, R. Messner, Kenji Hamano, W. N. Cottingham, W.A. Wenzel, R. Rahmat, J. J. Back, G. Vasseur, U. Langenegger, K. R. Schubert, R. Bula, T. Cuhadar-Donszelmann, F. Di Lodovico, K. C. Schofield, Mauro Morandin, Shanhui Fan, I. Narsky, W. Menges, A. J. Bevan, A. E. Blinov, C. C. Young, G. Schott, S. K. Swain, W. T. Meyer, A. J. Hart, Bernard Aubert, D. J. Payne, J. W. Berryhill, G. Rong, Ch Thiebaux, V. Eschenburg, M. Haire, J. C. Williams, H. Staengle, V. Lombardo, C. Touramanis, G. Calderini, O. Hamon, U. Nauenberg, R. Cenci, V. B. Golubev, L. Bosisio, F. Muheim, E. Chen, Q. H. Guo, B. Stugu, W. D. Hulsbergen, Roberto Calabrese, B. C. Shen, Corrado Angelini, L.M. Zhang, R. Andreassen, B. Bhuyan, H. Nicholson, Julie Malcles, G. Eigen, T. W. Beck, M. V. Purohit, A. Zallo, G. Therin, Andrei Gritsan, D. Dujmic, A. Samuel, Ch Yèche, O. L. Buchmueller, G. Vasileiadis, A. W. Weidemann, P. Taras, Martino Margoni, J. Ocariz, F. Couderc, M. Pripstein, F. Bianchi, A. Lazzaro, D. Su, Bruce Mellado, F. Safai Tehrani, P. C. Bloom, G. Benelli, Maurizio Pierini, R. Kroeger, Nicolas Berger, D. Boutigny, G. Marchiori, Silvano Tosi, V. P. Druzhinin, D. G. Hitlin, G. Kukartsev, Pierluigi Paolucci, Ajit Mohapatra, C. Bozzi, U. Egede, V. Ziegler, H. J. Bulten, D. A. Hopkins, S. M. Spanier, E. O. Olaiya, L. Li Gioi, M. A. Saeed, T. S. Mattison, D. A. Sanders, V. Poireau, P. Tan, N. S. Knecht, G. Sciolla, A. T. Watson, B. Dahmes, T. J. Harrison, J. W. Gary, K. Honscheid, N. R. Barlow, F. Palombo, V. Halyo, C. A. Chavez, M. Wittgen, S. Ye, A. Buzzo, Lluisa-Maria Mir, T. C. Petersen, A. N. Yushkov, Douglas Wright, G. W. Brandenburg, M. Gaspero, J. Va'vra, Junqiao Wu, Vivek Sharma, R. Frey, C. Hast, A. E. Rubin, D. J. Lange, M. Piccolo, M. T. Allen, G. Piredda, A. Dvoretskii, J. C. Chen, Paul Kyberd, M. H. Kelsey, C. K. Lae, James D. Olsen, J. S. Minamora, R. C. Field, F. Salvatore, R. J. Barlow, Maria Roberta Monge, I. J. Forster, J. Chauveau, A. Mihalyi, N. Danielson, F. Galeazzi, R. Ter-Antonyan, N. Chevalier, M. Posocco, G. Nesom, A. Satpathy, J.J. Reidy, L. Gladney, S. Bettarini, M. L. Perl, M. Morii, S. Rodier, Nicola Cavallo, G. Batignani, G. Rizzo, C. Hearty, P. S. Jackson, L. T. Kerth, J. A. McKenna, T. Abe, K. K. Gan, A. B. Breon, E. Paoloni, R. Faccini, J. Biesiada, J. T. Boyd, F. Ferrarotto, A. J. Lankford, F. Le Diberder, Joseph Izen, L. Del Buono, F. R. Wappler, W. Gradl, D. Hufnagel, Sh. Rahatlou, M. Mandelkern, J. F. Hirschauer, G. Finocchiaro, V. Luth, E. A. Eckhart, R. S. Dubitzky, R. Capra, Nicola Neri, Marcella Bona, D. Monorchio, P. Spradlin, R. Eckmann, J. D. Richman, Pu Wang, M. Fritsch, M. Carpinelli, C. M. Cormack, M. Bondioli, S. S. Hertzbach, D. J. Summers, B. G. Fulsom, M. T. Naisbit, Lydia Roos, D. J. Bard, J. R. Johnson, M. S. Alam, J. M. LoSecco, M. Verderi, M. H. Schune, N. L. Blount, T. Schalk, H. W. Zhao, P. D. Dauncey, X. R. Chen, T. Held, K. E. Ford, Y. Groysman, L. Wilden, U. Uwer, T. Brandt, M. Morganti, A. Snyder, N. B. Sinev, T. Hadig, R. Stroili, H. A. Neal, A. Gaidot, N. De Groot, M. A. Mazzoni, G. Wormser, Mirco Andreotti, T. B. Moore, Olga Igonkina, K. A. Ulmer, D. Fortin, J. Button-Shafer, M. L. Kocian, P. Grenier, F. F. Wilson, Enrico Robutti, U. Mallik, G. P. Gopal, C. H. Cheng, C. Gatto, Amanda Weinstein, J. Marks, A. Ryd, A. Höcker, J. Libby, J. R. Fry, C. Cartaro, W. T. Ford, A. Hauke, G. A. Cowan, S. Emery, E. P. Solodov, W. M. Bugg, D. Kovalskyi, M. Bomben, Tim Adye, R. D. Kass, R. J. Sobie, A. Perazzo, C. Voena, M. M. Macri, K. Wang, John Allison, S. J. Sekula, T. Schroeder, Francesco Fabozzi, A. Stocchi, Alberto Lusiani, P. Kim, Robert N. Cahn, R. K. Yamamoto, I. Eschrich, S. Willocq, R. Contri, A. Jawahery, G. Della Ricca, M. Pappagallo, L. Vitale, S. D. Foulkes, F. Martinez-Vidal, Claudio Campagnari, G. Cibinetto, R. de Sangro, P. Lund, S. L. Wu, R. L. Flack, Dominik Müller, G. Mancinelli, F. Bucci, Chunhui Chen, J. Brose, D. E. Hutchcroft, J. M. Bauer, J. Schubert, Davide Piccolo, W. Dunwoodie, C. Dallapiccola, Ch De La Vaissière, S. Brunet, Y. B. Pan, M. G. Green, J. J. Hollar, V. Azzolini, R. Kowalewski, B. Franek, V. Lepeltier, F. Forti, S. F. Ganzhur, H. R. Band, W. H. Toki, A. Calcaterra, S. Otto, W. S. Lockman, K. Goetzen, M. Benayoun, G. P. Dubois-Felsmann, Q. L. Zeng, Q. K. Wong, D. Bernard, V. E. Ozcan, J. C. Dingfelder, W. Panduro Vazquez, P. J. Oddone, M. R. Convery, P. Roudeau, G. R. Bonneaud, B. Spaan, G. Lynch, A. P. Onuchin, H. Briand, C. Roat, A. D. Bukin, J. Dorfan, J. P. Burke, E. Torrence, M. Davier, P. David, L. Lanceri, Stéphane Plaszczynski, I. Ofte, A. M. Boyarski, A. Chen, D. Dong, D. P. Stoker, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, N. Arnaud, A. Santroni, B. A. Petersen, C. L. Brown, B. Mayer, A. K. Yarritu, R. Claus, Matteo Negrini, E. Won, M. S. Gill, Y. S. Zhu, J. R. Gaillard, G. W. London, Roberto Covarelli, R. W. Kadel, A. Palano, S. E. Morgan, S. Schenk, M. Dickopp, M. Legendre, J. Schwiening, Liliana Teodorescu, C. T. Day, X. C. Lou, J. J. Walsh, J. Kroseberg, G. Cavoto, A. M. Rahimi, T. E. Latham, G. S. Abrams, D. N. Brown, D. Côté, H. Marsiske, G. D. Lafferty, Sai-Juan Chen, A. M. Lutz, M. Bruinsma, W. J. Wisniewski, J. E. Sundermann, S. Passaggio, D. D. Altenburg, Eleonora Luppi, Justin Albert, T. R. McMahon, T. Piatenko, E. Grauges, C. T. Potter, Mario Giorgi, S. Morganti, Sridhara Dasu, E. Feltresi, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, K. T. Flood, S. Saremi, R. Sacco, H. L. Snoek, Yuehong Xie, Y. P. Lau, A. J.S. Smith, J. Stelzer, B. T. Meadows, G. Raven, J. I. Yi, M. D. Sokoloff, C. M. Brown, P. R. Burchat, M. G. Wilson, D. A. Roberts, F. E. Taylor, G. Grosdidier, M. T. Graham, Peter Elmer, T. Glanzman, R. F. Schwitters, K. Peters, D. B. MacFarlane, M. Lu, A. M. Eichenbaum, C. A. Heusch, E. A. Kravchenko, C. Voci, Crisostomo Sciacca, D. Aston, S. H. Robertson, F. B. Viaud, V. Klose, Herbert Koch, S. Curry, Markus Cristinziani, P. Patteri, F. X. Yumiceva, G. Blaylock, Yu G. Kolomensky, M. K. Sullivan, A. D'Orazio, F. Blanc, M. C. Hodgkinson, A. Oyanguren, G. Graziani, E. I. Rosenberg, Brandon L. Hartfiel, J. P. Coleman, M. C. Simani, F. Anulli, S. Dittongo, R. Bartoldus, and Matteo Rama

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Crystallography, Pair production, 010308 nuclear & particles physics, Branching fraction, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, 010306 general physics, 01 natural sciences
Abstract

We report a search for the decays B{sup 0}{yields}D{sub s}{sup -}D{sub s}{sup +}, B{sup 0}{yields}D{sub s}*{sup -}D{sub s}{sup +}, and B{sup 0}{yields}D{sub s}*{sup -}D{sub s}*{sup +} in a sample of 232x10{sup 6} {upsilon}(4S) decays to BB pairs collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} storage ring. We find no significant signal and set upper bounds for the branching fractions: B(B{sup 0}{yields}D{sub s}{sup -}D{sub s}{sup +})

Published
2005

41. Evidence forB+→K¯0K+andB0→K0K¯0, and Measurement of the Branching Fraction and Search for DirectCPViolation inB+→K0π+

Author

B. C. Shen, Y. Karyotakis, J. Ocariz, T. J. Harrison, J. W. Gary, J. Va'vra, J.J. Reidy, R. S. Dubitzky, J. M. LoSecco, N. B. Sinev, C. M. Hawkes, A. A. Salnikov, O. Hamon, John Allison, F. Di Lodovico, Bernard Aubert, A. K. Mohapatra, D. J. Payne, J. Schubert, Davide Piccolo, M. Verderi, U. Nauenberg, T. Hadig, A. Lazzaro, D. Su, Enrico Robutti, V. E. Ozcan, A. Samuel, U. Mallik, Silvano Tosi, V. Poireau, James R. Wilson, C. Cartaro, M. Steinke, K. Yi, M. Piccolo, Mohamed H. Ahmed, U. Langenegger, M. T. Allen, G. Eigen, F. Safai Tehrani, P. C. Bloom, S. Rodier, G. Batignani, P. S. Jackson, N. S. Knecht, Paul Kyberd, W. Gradl, Mauro Morandin, A. J. Bevan, S. Bettarini, R. Capra, F. Muheim, J. M. Roney, Luca Lista, Nicolas Berger, D. A. Hopkins, S. M. Spanier, K. A. George, J. G. Smith, G. W. Morton, M. H. Schune, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, A. Ryd, T. B. Moore, M. B. Nikolich, P. Grenier, D. E. Hutchcroft, J. M. Bauer, C. Dallapiccola, Ch De La Vaissière, J. J. Hollar, M. Macri, S. F. Ganzhur, H. R. Band, A. Hauke, H. Schröder, S. Luitz, W. S. Lockman, G. P. Taylor, D. C. Williams, Q. L. Zeng, M. R. Convery, M. J.J. John, R. Aleksan, M. Chao, S. Willocq, G. Schott, S. B. Zain, A. Gaidot, G. De Nardo, G. Della Ricca, Kenji Hamano, P. J. Oddone, R. Godang, C. Lu, D. Judd, G. P. Gopal, C. J. Flacco, Amanda Weinstein, H. M. Lacker, Y. B. Pan, H. L. Lynch, R. Kowalewski, S. Emery, Julie Malcles, V. B. Golubev, G. Therin, G. W. Brandenburg, M. Pripstein, G. Benelli, M. Barrett, I. Ofte, Maurizio Pierini, D. M. Strom, K. S. Chaisanguanthum, R. Contri, L. Li Gioi, E. O. Olaiya, M. A. Saeed, Nicola Cavallo, N. R. Barlow, E. Charles, Fabio Cossutti, Michael Kelly, Bruce Schumm, F. Palombo, Junqiao Wu, Vivek Sharma, James D. Olsen, V. Lepeltier, C. K. Lae, G. Rizzo, Olga Igonkina, Yu I. Skovpen, J. L. Ritchie, I. Kitayama, W. Roethel, J. Strube, W. T. Ford, L. Piemontese, H. P. Paar, J. E. Brau, M. Spitznagel, L. T. Kerth, M. Benayoun, Tim Adye, J. A. McKenna, R. D. Kass, C. Hearty, B. N. Ratcliff, E. A. Eckhart, Matteo Rama, R. Frey, M. H. Kelsey, A. J. Hart, T. Abe, S. Ricciardi, Wp Vazquez, M. Pioppi, G. S. Abrams, X. Giroux, E. Gabathuler, A. J. Edwards, F. C. Porter, N. D. Qi, R. Schwierz, D. J. Summers, B. G. Fulsom, Alexis Pompili, Tetiana Hryn'ova, S. Prell, H. K. Hadavand, Jie Zhang, L. Bosisio, B. Cheng, V. E. Blinov, Hyun-Chul Kim, James H Cochran, B. Lewandowski, C. L. Edgar, K. T. Flood, K. Suzuki, J. R. Johnson, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, J. W. Berryhill, L. Vitale, R. Andreassen, A. Soffer, A. W. Weidemann, S. Saremi, H. J. Bulten, F. Martinez-Vidal, Dominik Müller, F. Gallo, M. Zito, R. G. Jacobsen, J. P. Lees, H. Nicholson, Yu. G. Kolomensky, Patricia R. Burchat, Q. K. Wong, A. E. Blinov, C. C. Young, R. Sacco, H. L. Snoek, T. Cuhadar-Donszelmann, S. J. Gowdy, M. Mandelkern, V. B. Koptchev, Martino Margoni, D. W. G. S. Leith, W. N. Cottingham, W. T. Meyer, G. Mancinelli, C. Touramanis, Maurizio Biasini, E. Luppi, Pierluigi Paolucci, K. Goetzen, R. Calabrese, N. Danielson, A. N. Yushkov, R. Barate, S. Ahmed, Owen Rosser Long, A. Seiden, F. Simonetto, Douglas Wright, D. Gamba, T. M. Hong, W. F. Mader, R. H. Schindler, Sw. Banerjee, Yuehong Xie, J. M. Thompson, S. Schrenk, I. J. Forster, F. Galeazzi, M. L. Perl, Shanhui Fan, J. P. Burke, E. Torrence, W. Menges, Marcello Rotondo, H. U. Flaecher, A. Zghiche, R. J. Wilson, P. David, K. K. Gan, R. Messner, R. C. Field, F. Salvatore, Y. P. Lau, A. Satpathy, G. Calderini, G. Rong, V. Eschenburg, L. M. Cremaldi, H. Kagan, J. F. Hirschauer, G. B. Mohanty, Paul Jackson, J. A. Ernst, M. Saleem, A. Santroni, G. Finocchiaro, V. Luth, Virginia Azzolini, M. S. Alam, A. J.S. Smith, M. Datta, H. B. Crawley, P. Taras, E. P. Solodov, Wouter Verkerke, R. Liu, R. Kroeger, S. K. Swain, J. J. Back, E. Chen, Q. H. Guo, B. Stugu, P. J. Clark, J. Stelzer, S. Playfer, C. P. O'Grady, D. J. Bard, A. Snyder, D. Boutigny, T. Held, K. E. Ford, L.M. Zhang, F. F. Wilson, A. T. Watson, R. K. Mommsen, D. Dujmic, Akram Khan, M. A. Baak, A. V. Telnov, W. Kozanecki, G. Marchiori, K. Koeneke, D. G. Hitlin, Ch Thiebaux, H. Staengle, M. Fritsch, M. Gaspero, J. H. von Wimmersperg-Toeller, M. Battaglia, B. T. Meadows, V. Halyo, G. Raven, S. S. Hertzbach, P. Rankin, A. Kreisel, Y. Groysman, S. Ye, T. C. Petersen, L. Wilden, G. Nesom, J. I. Yi, M. D. Sokoloff, C. M. Brown, M. A. Mazur, R. J. Parry, E. Di Marco, G. Lynch, L. Gladney, D. H. Wright, R. Faccini, J. A. Kadyk, J. Biesiada, F. Ferrarotto, R. Ter-Antonyan, M. Carpinelli, S. Otto, M. T. Naisbit, Lydia Roos, T. S. Mattison, D. A. Sanders, M. Morganti, Peter Elmer, P. Tan, G. Wagner, P. Lund, R. L. Flack, C. Patrignani, A. Cunha, V. Tisserand, Nicola Neri, F. Le Diberder, Marcella Bona, J. Brose, A. Calcaterra, L. Del Buono, M. L. Kocian, J. D. Richman, T. Schalk, M. G. Wilson, C. Hast, D. J. Lange, R. Eckmann, G. Piredda, A. Dvoretskii, J. C. Chen, W. A. Wenzel, D. A. Roberts, F. E. Taylor, C. Roat, M. A. Mazzoni, G. Wormser, R. Cenci, M. Morii, K. Peters, G. Grosdidier, A. Zallo, F. Couderc, C. Gatto, A. V. Gritsan, D. P. Stoker, M. Lu, F. R. Wappler, M. T. Graham, T. J. Orimoto, D. Fortin, M. S. Gill, Sh. Rahatlou, A. M. Eichenbaum, R. Claus, Matteo Negrini, Roberto Covarelli, R. W. Kadel, J. Marks, R. R. Kofler, A. Palano, T. Schroeder, B. Spaan, M. Krishnamurthy, G. A. Cowan, D. E. Wagoner, S. Schenk, K. A. Ulmer, T. Glanzman, A. M. Boyarski, R. F. Schwitters, P. Kim, W. O. Ruddick, Gabriele Simi, W. Dunwoodie, D. B. MacFarlane, Justin Albert, H. Briand, A. D. Bukin, J. Kroseberg, G. Cavoto, S. Jayatilleke, C. L. Davis, L. Lanceri, Stéphane Plaszczynski, F. Bucci, R. Gamet, J. Chauveau, Francesco Fabozzi, D. S. Best, G. Vasileiadis, C. M. Cormack, B. Franek, M. Bondioli, M. Haire, J. C. Williams, L. M. Mir, T. R. McMahon, T. Piatenko, Denis Bernard, Markus Cristinziani, N. De Groot, P. F. Giraud, J. C. Dingfelder, S. J. Sekula, N. A. Roe, P. Roudeau, G. P. Dubois-Felsmann, A. Jawahery, S. D. Foulkes, Chunhui Chen, G. Cibinetto, E. Grauges, C. T. Potter, Mario Giorgi, F. X. Yumiceva, S. Morganti, D. Dong, Sridhara Dasu, A. P. Onuchin, E. Won, A. Chen, Y. S. Zhu, J. R. Gaillard, G. W. London, G. Blaylock, B. A. Petersen, C. L. Brown, A. B. Breon, E. Feltresi, D. Côté, S. E. Morgan, B. Dahmes, S. Pacetti, M. Dickopp, M. Legendre, C. H. Cheng, Colin Jessop, R. Cowan, J. Schwiening, R. Prepost, H. Marsiske, Liliana Teodorescu, X. C. Lou, J. J. Walsh, R. Nogowski, A. M. Rahimi, T. E. Latham, R. K. Yamamoto, Xiang Li, C. A. Heusch, J. Libby, C. D. Buchanan, Niels Anton van Bakel, I. Narsky, D. N. Brown, A. Olivas, E. A. Kravchenko, M. Weaver, Andrew Lankford, K. Wang, R. Baldini-Ferroli, G. D. Lafferty, W. Bhimji, D. Kirkby, G. Vasseur, Corrado Angelini, B. Bhuyan, K. C. Schofield, A. Höcker, A. Stocchi, O. L. Buchmueller, M. G. Green, V. P. Druzhinin, C. Voci, C. Bozzi, K. Honscheid, C. A. Chavez, Crisostomo Sciacca, D. Aston, I. Eschrich, A. Buzzo, R. J. Barlow, J. R. Fry, Claudio Campagnari, N. Chevalier, M. Posocco, F. Forti, M. Davier, D. Monorchio, H. W. Zhao, P. D. Dauncey, V. Lombardo, Mirco Andreotti, R. de Sangro, S. L. Wu, P. Patteri, U. Egede, S. Brunet, M. K. Sullivan, W. H. Toki, G. Sciolla, A. D'Orazio, S. H. Robertson, V. Klose, Herbert Koch, S. Curry, B. Viaud, J. T. Boyd, Joseph Izen, F. Blanc, A. M. Eisner, M. C. Hodgkinson, A. Oyanguren, Hui Li, G. Graziani, Walter R. Innes, A. Roodman, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, J. P. Coleman, M. C. Simani, F. Anulli, S. Dittongo, T. Pulliam, Sergio Grancagnolo, A. Petzold, Roland Waldi, F. Ferroni, G. Hamel de Monchenault, R. S. Panvini, D. A. Bowerman, Paul Fraser Harrison, W. D. Hulsbergen, P. M. Patel, M. V. Purohit, Stephen Robert Wagner, J.H. Panetta, K. R. Schubert, Bruce Mellado, M. Wittgen, Janice Button-Shafer, G. R. Bonneaud, D. Bettoni, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, R. Bartoldus, V. Eyges, Zongfu Yu, M. J. Charles, D. del Re, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, M. Pappagallo, J. A. Nash, M. Lo Vetere, J. M. Dorfan, Francesco Polci, M. Pelizaeus, F. Bellini, Ch Yèche, G. Kukartsev, R. N. Cahn, Maria Roberta Monge, A. Mihalyi, E. Paoloni, P. Spradlin, X. R. Chen, M. T. Ronan, I. M. Peruzzi, T. W. Beck, S. I. Serednyakov, F. Bianchi, D. D. Brown, A. E. Rubin, D. Hufnagel, Pu Wang, Sai-Juan Chen, A. M. Lutz, M. Bruinsma, W. J. Wisniewski, J. E. Sundermann, S. Passaggio, and S. A. Majewski

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hadron, General Physics and Astronomy, Elementary particle, Charge (physics), 01 natural sciences, Nuclear physics, Particle decay, Crystallography, 0103 physical sciences, CP violation, B meson, 010306 general physics, Dimensionless quantity, Bar (unit)
Abstract

The authors present evidence for the b {yields} d penguin-dominated decays B{sup +} {yields} {bar K}{sup 0}K{sup +} and B{sup 0} {yields} K{sup 0}{bar K}{sup 0} with significances of 3.5 and 4.5 standard deviations, respectively. The results are based on a sample of 227 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC. We measure the branching fractions {Beta}(B{sup +} {yields} {bar K}{sup 0}K{sup +}) = (1.5 {+-} 0.5 {+-} 0.1) x 10{sup -6} (< 2.4 x 10{sup -6}) and {Beta}(B{sup 0} {yields} K{sup 0}{bar K}{sup 0}) = (1.19{sub -0.35}{sup +0.40} {+-} 0.13) x 10{sup -6}, where the uncertainties are statistical and systematic, respectively, and the upper limit on the branching fraction for {bar K}{sup 0}K{sup +} is at the 90% confidence level. They also present improved measurements of the charge-averaged branching fraction {Beta}(B{sup +} {yields} K{sup 0}{pi}{sup +}) = (26.0 {+-} 1.3 {+-} 1.0) x 10{sup -6} and CP-violating charge asymmetry {Alpha}{sub CP} (K{sup 0}{pi}{sup +}) = -0.09 {+-} 0.05 {+-} 0.01, where the uncertainties are statistical and systematic, respectively.

Published
2005

42. Measurement ofCPobservables for the decaysB±→DCP0K*±

Author

H. Schröder, S. Luitz, D. C. Williams, M. Chao, Kenji Hamano, P. J. Clark, G. W. Brandenburg, J. Stelzer, A. V. Gritsan, J. Chauveau, R. Contri, V. B. Golubev, G. Therin, C. M. Cormack, M. S. Gill, R. K. Mommsen, V. Lepeltier, M. Benayoun, P. Grenier, D. E. Hutchcroft, J. M. Bauer, Roberto Covarelli, C. Dallapiccola, P. Kim, R. W. Kadel, S. Bettarini, Maurizio Pierini, Maurizio Biasini, M. Bondioli, T. B. Moore, A. Hauke, T. Schalk, Denis Bernard, A. Palano, A. J. Edwards, R. Godang, B. T. Meadows, S. Schenk, Hyun-Chul Kim, G. Raven, Roberto Calabrese, Ch De La Vaissière, S. Pacetti, B. C. Shen, J. J. Hollar, R. C. Field, F. Salvatore, M. A. Mazzoni, R. Cowan, J. I. Yi, G. Wormser, Ch Yèche, T. S. Mattison, D. A. Sanders, H. M. Lacker, H. L. Lynch, M. D. Sokoloff, C. M. Brown, G. Kukartsev, F. Bucci, C. K. Lae, R. R. Kofler, M. Krishnamurthy, Chunhui Chen, J. Ocariz, G. P. Taylor, I. Narsky, Michael Kelly, J. L. Ritchie, G. Rizzo, R. N. Cahn, Maria Roberta Monge, K. Suzuki, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, A. Gaidot, G. P. Gopal, D. Dong, P. Tan, Owen Rosser Long, A. Seiden, G. B. Mohanty, C. Hast, A. Mihalyi, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, J. F. Hirschauer, G. Finocchiaro, V. Luth, Amanda Weinstein, M. Datta, D. E. Wagoner, W. O. Ruddick, M. J.J. John, R. Aleksan, S. B. Zain, K. T. Flood, Wouter Verkerke, Douglas Wright, J. A. McKenna, J. J. Back, P. F. Giraud, I. Kitayama, S. I. Serednyakov, D. J. Lange, G. Piredda, A. Dvoretskii, E. P. Solodov, M. Morii, S. Saremi, M. A. Mazur, E. Paoloni, T. J. Harrison, J. W. Gary, J. Va'vra, G. De Nardo, C. Gatto, R. J. Parry, D. Monorchio, John Allison, S. Emery, S. F. Ganzhur, H. R. Band, W. S. Lockman, E. Won, Q. L. Zeng, J. C. Dingfelder, P. Roudeau, R. Sacco, J. Kroseberg, M. S. Alam, Y. S. Zhu, P. Spradlin, J. R. Gaillard, I. J. Forster, M. R. Convery, Gabriele Simi, Ch Thiebaux, H. Staengle, X. R. Chen, H. K. Hadavand, H. W. Zhao, H. Nicholson, F. Di Lodovico, P. D. Dauncey, M. T. Ronan, R. G. Jacobsen, G. W. London, A. B. Breon, G. Schott, M. Barrett, R. Bartoldus, C. Lu, D. Judd, T. Schroeder, C. J. Flacco, A. Snyder, S. E. Morgan, F. F. Wilson, Bernard Aubert, A. K. Mohapatra, D. J. Payne, V. Eyges, Zongfu Yu, R. K. Yamamoto, H. L. Snoek, M. Dickopp, M. Legendre, Yuehong Xie, V. B. Koptchev, G. Cavoto, J.J. Reidy, E. Di Marco, Patricia R. Burchat, Mirco Andreotti, F. R. Wappler, Martino Margoni, O. Hamon, Y. P. Lau, U. Nauenberg, C. L. Davis, R. Gamet, M. J. Charles, D. del Re, J. Schwiening, S. Ahmed, Liliana Teodorescu, R. S. Dubitzky, N. Van Bakel, D. Gamba, D. H. Wright, X. C. Lou, J. J. Walsh, Sh. Rahatlou, D. M. Strom, K. S. Chaisanguanthum, J. P. Lees, M. G. Green, P. J. Oddone, J. W. Berryhill, J. M. LoSecco, A. M. Rahimi, T. E. Latham, S. Schrenk, C. Patrignani, W. Dunwoodie, A. Samuel, J. Schubert, H. Kagan, L. Li Gioi, A. Lazzaro, Davide Piccolo, M. Haire, R. Andreassen, J. A. Nash, M. Lo Vetere, D. N. Brown, A. Cunha, V. Tisserand, N. B. Sinev, A. W. Weidemann, B. Franek, D. Su, V. Poireau, Silvano Tosi, S. Willocq, G. Della Ricca, M. G. Wilson, M. Saleem, J. H. von Wimmersperg-Toeller, M. Battaglia, Francesco Polci, Y. B. Pan, D. A. Roberts, E. Charles, Fabio Cossutti, S. A. Majewski, M. Piccolo, E. Chen, Q. H. Guo, B. Stugu, F. E. Taylor, M. T. Allen, G. Grosdidier, N. A. Roe, G. P. Dubois-Felsmann, J. M. Thompson, Nicola Cavallo, Pierluigi Paolucci, M. Verderi, M. Pelizaeus, S. Rodier, R. Kowalewski, G. Batignani, M. Davier, D. Dujmic, H. J. Bulten, W. Roethel, N. Danielson, F. Galeazzi, J. Strube, Y. Karyotakis, M. T. Graham, M. M. Macri, T. Hadig, F. Bellini, G. D. Lafferty, W. Gradl, S. Playfer, D. Bettoni, Paul Jackson, Enrico Robutti, V. E. Ozcan, M. L. Perl, K. K. Gan, C. P. O'Grady, G. Marchiori, M. Mandelkern, U. Mallik, B. Dahmes, V. Lombardo, Marcello Rotondo, H. U. Flaecher, A. Zghiche, R. J. Wilson, S. J. Sekula, L. M. Cremaldi, P. Lund, R. L. Flack, A. Jawahery, P. C. Bloom, S. D. Foulkes, G. Cibinetto, S. Otto, A. N. Yushkov, C. Cartaro, Yu I. Skovpen, M. A. Baak, J. Brose, A. Calcaterra, V. Halyo, Corrado Angelini, A. J.S. Smith, Olga Igonkina, R. Messner, N. S. Knecht, L. Piemontese, T. Glanzman, W. T. Ford, A. M. Boyarski, G. Rong, A. V. Telnov, R. F. Schwitters, S. K. Swain, I. Ofte, K. Koeneke, L. Gladney, V. Eschenburg, D. B. MacFarlane, R. Faccini, J. A. Kadyk, J. Biesiada, F. Ferrarotto, Tim Adye, R. D. Kass, C. Hearty, A. Satpathy, C. Roat, Paul Kyberd, B. Bhuyan, L.M. Zhang, O. L. Buchmueller, P. Taras, E. A. Eckhart, F. Le Diberder, Marcella Bona, P. S. Jackson, G. Mancinelli, C. M. Hawkes, D. P. Stoker, E. Gabathuler, D. G. Hitlin, P. Rankin, S. Ye, J. D. Richman, R. Claus, U. Egede, D. J. Summers, B. G. Fulsom, A. P. Onuchin, K. Goetzen, F. C. Porter, Matteo Negrini, A. Chen, B. A. Petersen, T. C. Petersen, B. Spaan, M. Gaspero, G. Sciolla, V. P. Druzhinin, C. Bozzi, R. Ter-Antonyan, Mauro Morandin, A. J. Bevan, G. Nesom, T. J. Orimoto, D. Fortin, R. Capra, H. P. Paar, C. L. Brown, F. Muheim, Nicola Neri, D. Côté, M. Fritsch, H. Briand, J. E. Brau, X. Giroux, J. Marks, J. P. Burke, E. Torrence, A. D. Bukin, G. W. Morton, L. Lanceri, K. Honscheid, P. David, J. M. Roney, C. A. Chavez, M. H. Schune, A. A. Salnikov, Nicolas Berger, L. Del Buono, S. S. Hertzbach, Y. Groysman, G. A. Cowan, L. Wilden, A. Kreisel, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, D. A. Hopkins, S. M. Spanier, G. Lynch, U. Uwer, R. Eckmann, Stéphane Plaszczynski, R. Frey, T. Brandt, R. Stroili, H. A. Neal, M. H. Kelsey, Luca Lista, T. Abe, A. Santroni, Virginia Azzolini, H. Marsiske, R. Cenci, A. Buzzo, A. Khan, M. L. Kocian, J. T. Boyd, Joseph Izen, R. J. Barlow, K. A. Ulmer, M. Spitznagel, L. Vitale, A. Zallo, T. Held, K. E. Ford, F. Martinez-Vidal, Dominik Müller, W. A. Wenzel, K. A. George, Walter R. Innes, Yu. G. Kolomensky, F. Couderc, J. R. Johnson, Sai-Juan Chen, B. N. Ratcliff, A. Ryd, N. Chevalier, J. Libby, M. Posocco, A. Roodman, A. M. Lutz, S. J. Gowdy, J. G. Smith, K. Wang, Q. K. Wong, M. Bruinsma, W. J. Wisniewski, Francesco Fabozzi, T. Pulliam, G. Vasileiadis, Roland Waldi, Matteo Rama, A. Stocchi, M. B. Nikolich, J. E. Sundermann, N. D. Qi, R. Schwierz, F. Ferroni, S. Prell, J. A. Ernst, R. Barate, I. Eschrich, Jie Zhang, James H Cochran, S. Passaggio, Sw. Banerjee, Claudio Campagnari, D. A. Bowerman, B. Lewandowski, Paul Fraser Harrison, Eleonora Luppi, A. Soffer, James R. Wilson, T. Cuhadar-Donszelmann, C. Touramanis, F. Gallo, Justin Albert, F. Simonetto, W. F. Mader, R. H. Schindler, P. M. Patel, Stephen Robert Wagner, J.H. Panetta, F. Forti, M. Steinke, K. Yi, M. Zito, Bruce Schumm, S. Jayatilleke, Mohamed H. Ahmed, H. B. Crawley, K. R. Schubert, Shanhui Fan, A. E. Blinov, D. S. Best, T. M. Hong, W. Menges, C. C. Young, W. T. Meyer, L. M. Mir, T. R. McMahon, T. Piatenko, U. Langenegger, E. Grauges, C. T. Potter, Mario Giorgi, A. J. Hart, S. Morganti, Sridhara Dasu, G. Eigen, F. Safai Tehrani, R. Kroeger, Junjie Chen, L. Bosisio, E. Feltresi, Colin Jessop, D. Boutigny, A. T. Watson, R. Prepost, R. Nogowski, Xiang Li, C. D. Buchanan, A. Olivas, M. Weaver, R. Baldini-Ferroli, Markus Cristinziani, W. Bhimji, D. Kirkby, G. Vasseur, F. X. Yumiceva, P. Patteri, G. Blaylock, K. C. Schofield, Peter Elmer, G. Wagner, K. Peters, M. Lu, J. Williams, A. M. Eichenbaum, C. A. Heusch, Andrew Lankford, E. A. Kravchenko, C. Voci, M. K. Sullivan, Crisostomo Sciacca, D. Aston, A. D'Orazio, F. Blanc, M. C. Hodgkinson, N. De Groot, C. H. Cheng, A. Oyanguren, G. Graziani, A. Höcker, J. R. Fry, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, J. P. Coleman, M. C. Simani, F. Anulli, S. Dittongo, S. H. Robertson, V. Klose, R. de Sangro, S. L. Wu, Herbert Koch, S. Curry, B. Viaud, S. Brunet, W. H. Toki, A. M. Eisner, Hui Li, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, W. D. Hulsbergen, M. V. Purohit, Bruce Mellado, M. Wittgen, Julie Malcles, M. Pripstein, G. Benelli, E. O. Olaiya, M. A. Saeed, N. R. Barlow, F. Palombo, Junqiao Wu, Vivek Sharma, James D. Olsen, L. T. Kerth, R. Liu, W. Kozanecki, Wp Vazquez, M. Pioppi, G. S. Abrams, B. Cheng, V. E. Blinov, C. L. Edgar, D. W. G. S. Leith, W. N. Cottingham, G. Calderini, Janice Button-Shafer, G. R. Bonneaud, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, D. J. Bard, M. Pappagallo, J. M. Dorfan, I. M. Peruzzi, T. W. Beck, F. Bianchi, D. D. Brown, A. E. Rubin, D. Hufnagel, and Pu Wang

Subjects
Physics, Particle physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, 0103 physical sciences, Analytical chemistry, CP violation, Observable, B meson, 010306 general physics, 01 natural sciences, Engineering physics
Abstract

We present a study of the decay B^- → D^0_(CP)K^± and its charge conjugate, where D^0_CP) is reconstructed in CP-even, CP-odd, and non-CP flavor eigenstates, based on a sample of 232 x 10^6 Y(4S) → BB decays collected with the BABAR detector at the PEP-II e^+e^- storage ring. We measure the partial-rate charge asymmetries A_(CP±) and the ratios R_(CP±) of the B → D^0K decay branching fractions as measured in CP^± and non-CP D^0 decays: A_(CP±) 0:35 ± 0.13(stat) ± 0.04(syst), A_(CP-)= -0.06 ± 0.13(stat) ± 0.04(syst), R_(CP+) = 0.90 ± 0.12(stat) ± 0.049syst), and R_(CP-) = 0:86 ± 0.10(stat) ± 0.05(syst).

Published
2005

43. Measurement of the branching fraction and decay rate asymmetry ofB−→Dπ+π−π0K−

Author

James R. Wilson, M. Steinke, K. Yi, S. A. Majewski, Mohamed H. Ahmed, U. Langenegger, Corrado Angelini, B. Bhuyan, A. Roodman, G. Eigen, F. Safai Tehrani, O. L. Buchmueller, M. M. Macri, S. J. Sekula, A. Jawahery, S. D. Foulkes, M. G. Wilson, V. P. Druzhinin, C. Bozzi, T. S. Mattison, D. A. Sanders, G. Cibinetto, Y. Karyotakis, T. Pulliam, Roland Waldi, D. A. Roberts, F. E. Taylor, P. Tan, C. Hast, R. Cenci, R. C. Field, F. Ferroni, A. M. Lutz, D. J. Lange, G. Piredda, F. Salvatore, R. Liu, T. Schalk, A. Dvoretskii, J. C. Chen, K. Honscheid, C. A. Chavez, E. P. Solodov, John Allison, A. P. Onuchin, A. Chen, J. Schubert, Davide Piccolo, F. Simonetto, W. F. Mader, P. C. Bloom, V. E. Ozcan, N. De Groot, A. Buzzo, N. S. Knecht, M. Morii, B. A. Petersen, C. L. Brown, A. Zallo, M. T. Graham, F. Di Lodovico, Paul Kyberd, G. Finocchiaro, V. Luth, Bernard Aubert, D. A. Bowerman, F. Couderc, Paul Fraser Harrison, M. A. Mazzoni, G. Wormser, F. Colecchia, R. H. Schindler, R. J. Barlow, Shanhui Fan, R. Capra, M. S. Alam, C. H. Cheng, W. Kozanecki, G. W. Morton, M. H. Schune, W. Roethel, N. Chevalier, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, L. Piemontese, C. M. Hawkes, F. Blanc, A. Ryd, C. Gatto, A. K. Mohapatra, D. J. Payne, U. Nauenberg, F. R. Wappler, M. Posocco, A. Snyder, P. M. Patel, F. F. Wilson, Stephen Robert Wagner, J.H. Panetta, Sh. Rahatlou, T. Glanzman, D. Côté, T. Schroeder, R. F. Schwitters, A. Samuel, Amir Farbin, A. A. Salnikov, R. Kroeger, E. Gabathuler, W. R. Innes, F. C. Porter, D. B. MacFarlane, M. C. Hodgkinson, Eleonora Luppi, Julie Malcles, W. Dunwoodie, Silvano Tosi, Justin Albert, P. Kim, D. Boutigny, K. R. Schubert, V. Lombardo, S. Bailey, H. Marsiske, Douglas Wright, J. Libby, J. L. Ritchie, G. Graziani, V. B. Golubev, Peter Elmer, G. Wagner, K. Wang, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, B. Franek, M. Pripstein, G. Benelli, E. O. Olaiya, M. A. Saeed, N. R. Barlow, S. Jayatilleke, Bruce Schumm, F. Palombo, Vivek Sharma, J. R. Fry, Roberto Calabrese, B. C. Shen, Sai-Juan Chen, R. de Sangro, Ch Yèche, S. L. Wu, M. Verderi, G. Kukartsev, A. Stocchi, James D. Olsen, A. T. Watson, N. A. Roe, G. P. Dubois-Felsmann, B. N. Ratcliff, K. T. Flood, A. Oyanguren, G. Therin, T. Hadig, P. Roudeau, I. Kitayama, S. I. Serednyakov, M. Bruinsma, D. S. Best, W. J. Wisniewski, E. I. Rosenberg, S. Saremi, R. Godang, R. Sacco, I. J. Forster, C. T. Day, Brandon L. Hartfiel, L. T. Kerth, Enrico Robutti, S. Pacetti, U. Egede, G. Sciolla, J. E. Sundermann, M. C. Simani, J. Ocariz, K. Peters, I. Eschrich, N. D. Qi, R. Schwierz, H. M. Lacker, L. M. Mir, T. R. McMahon, T. Piatenko, T. Cuhadar-Donszelmann, P. S. Jackson, Maurizio Pierini, F. Bucci, S. Brunet, Marcello Rotondo, H. L. Snoek, W. H. Toki, R. Cowan, F. Anulli, R. N. Cahn, J. A. Ernst, S. Passaggio, Maria Roberta Monge, H. L. Lynch, A. Mihalyi, U. Mallik, M. Pioppi, A. Lu, S. J. Gowdy, V. Lillard, B. Cheng, Claudio Campagnari, S. Dittongo, P. Patteri, A. V. Gritsan, H. K. Hadavand, V. E. Blinov, M. S. Gill, I. Narsky, M. Lu, E. Grauges, J. Williams, D. J. Bard, M. L. Perl, H. U. Flaecher, A. Zghiche, M. P. Kelly, R. J. Wilson, L. M. Cremaldi, R. Contri, J. M. Roney, C. T. Potter, Mario Giorgi, Roberto Covarelli, R. W. Kadel, J. A. McKenna, E. Paoloni, C. Touramanis, A. W. Borgland, M. Barrett, M. Zito, Yuehong Xie, Y. P. Lau, R. Barate, Luca Lista, T. J. Harrison, J. W. Gary, J. T. Boyd, J. Va'vra, A. E. Blinov, Joseph Izen, S. K. Swain, A. Palano, S. Schenk, S. Morganti, J. W. Berryhill, R. Andreassen, Sridhara Dasu, D. W. G. S. Leith, C. Cartaro, A. J. Hart, W. N. Cottingham, F. Forti, G. Grosdidier, H. Kagan, D. Monorchio, D. M. Strom, K. S. Chaisanguanthum, C. C. Young, W. T. Meyer, J. Stelzer, A. M. Eichenbaum, K. A. George, J. G. Smith, J.J. Reidy, A. M. Eisner, J. H. von Wimmersperg-Toeller, M. Battaglia, P. Spradlin, X. R. Chen, M. T. Ronan, J. Kroseberg, G. Cavoto, L.M. Zhang, V. Lepeltier, H. W. Zhao, P. D. Dauncey, Pierluigi Paolucci, Hui Li, E. Feltresi, E. Charles, Fabio Cossutti, C. K. Lae, Sergio Grancagnolo, G. Calderini, M. Benayoun, R. R. Kofler, M. Krishnamurthy, M. B. Nikolich, Mirco Andreotti, L. Bosisio, R. S. Dubitzky, D. Bettoni, A. Petzold, J. M. LoSecco, G. Hamel de Monchenault, M. Carpinelli, M. K. Sullivan, M. T. Naisbit, Lydia Roos, R. S. Panvini, D. E. Wagoner, R. Bartoldus, V. Eyges, Zongfu Yu, P. F. Giraud, J. C. Dingfelder, M. G. Greene, M. Morganti, A. D'Orazio, P. Grenier, Colin Jessop, R. Prepost, R. Nogowski, H. B. Crawley, D. G. Hitlin, P. Rankin, S. Ye, T. C. Petersen, B. T. Meadows, G. Raven, W. O. Ruddick, J. I. Yi, M. D. Sokoloff, C. M. Brown, Xiang Li, R. G. Jacobsen, D. E. Hutchcroft, J. M. Bauer, Gabriele Simi, Yu I. Skovpen, N. Danielson, F. Galeazzi, K. K. Gan, S. Playfer, C. P. O'Grady, C. L. Davis, W. D. Hulsbergen, S. Otto, S. Bettarini, C. D. Buchanan, R. Ter-Antonyan, G. Rizzo, M. Saleem, P. R. Burchat, Sw Banerjee, M. V. Purohit, C. Dallapiccola, Ch De La Vaissière, S. H. Robertson, N. B. Sinev, Akram Khan, S. Rodier, C. Hearty, J. J. Hollar, C. A. Heusch, R. L. Flack, J. Brose, M. A. Baak, S. F. Ganzhur, H. R. Band, P. J. Clark, M. J. Charles, H. Kim, D. del Re, R. Gamet, V. Klose, Bruce Mellado, M. Haire, V. B. Koptchev, Herbert Koch, A. Olivas, B. Viaud, A. V. Telnov, A. Gaidot, T. B. Moore, Nicola Neri, M. Weaver, E. A. Eckhart, K. Koeneke, D. J. Summers, W. S. Lockman, M. Wittgen, A. W. Weidemann, Q. L. Zeng, R. Baldini-Ferroli, A. Hauke, W. Bhimji, D. Kirkby, A. Calcaterra, G. Vasseur, R. K. Yamamoto, A. Hocker, G. P. Gopal, Amanda Weinstein, S. Ahmed, E. A. Kravchenko, J. A. Nash, D. Gamba, H. Schröder, S. Luitz, R. K. Mommsen, K. C. Schofield, B. Spaan, B. Dahmes, M. R. Convery, D. C. Williams, M. Chao, M. G. Green, M. Bomben, R. J. Sobie, H. J. Bulten, A. Perazzo, C. Voena, L. Vitale, S. Schrenk, S. Emery, Kenji Hamano, G. Schott, C. Roat, J. P. Lees, D. P. Stoker, H. Briand, A. Satpathy, A. D. Bukin, F. Martinez-Vidal, Dominik Müller, C. Voci, Crisostomo Sciacca, D. Aston, M. Lo Vetere, P. J. Oddone, A. N. Yushkov, M. Davier, Q. K. Wong, G. W. London, A. B. Breon, Mauro Morandin, R. Claus, A. J. Bevan, Matteo Negrini, K. Paick, F. Muheim, L. Lanceri, Francesco Polci, Stéphane Plaszczynski, S. E. Morgan, M. Fritsch, E. Chen, Q. H. Guo, B. Stugu, M. Pelizaeus, S. S. Hertzbach, M. Dickopp, M. Legendre, Nicolas Berger, D. A. Hopkins, S. M. Spanier, Y. Groysman, L. Wilden, A. Dorigo, JunJie Wu, D. Dujmic, G. Lynch, H. P. Paar, J. E. Brau, X. Giroux, J. M. Thompson, M. A. Mazur, R. J. Parry, G. Marchiori, J. Schwiening, M. L. Kocian, Liliana Teodorescu, X. C. Lou, F. Bellini, G. P. Taylor, M. J.J. John, R. Aleksan, E. Di Marco, S. B. Zain, T. Held, K. E. Ford, J. J. Walsh, Paul Jackson, G. De Nardo, W. A. Wenzel, A. M. Rahimi, T. E. Latham, C. Lu, D. Judd, V. Halyo, D. H. Wright, C. J. Flacco, G. S. Abrams, O. Hamon, Yu. G. Kolomensky, C. Patrignani, A. Cunha, V. Tisserand, A. Lazzaro, D. Su, D. N. Brown, V. Poireau, M. Piccolo, M. T. Allen, L. Gladney, R. Faccini, G. Batignani, J. Biesiada, W. Gradl, M. Mandelkern, Markus Cristinziani, F. Ferrarotto, A. J. Lankford, F. Le Diberder, Marcella Bona, G. D. Lafferty, J. D. Richman, J. Chauveau, F. X. Yumiceva, C. M. Cormack, M. Bondioli, G. Blaylock, Denis Bernard, T. J. Orimoto, D. Fortin, J. A. Kadyk, Chunhui Chen, J. Marks, D. Dong, G. A. Cowan, E. Won, Y. S. Zhu, J. R. Gaillard, R. Frey, M. H. Kelsey, T. Abe, J. R. Johnson, J. Strube, A. J. Edwards, Maurizio Biasini, K. Suzuki, Owen Rosser Long, A. Seiden, G. B. Mohanty, H. Nicholson, M. Datta, Wouter Verkerke, Martino Margoni, J. J. Back, Ch Thiebaux, H. Staengle, L. Li Gioi, S. Willocq, G. Della Ricca, Nicola Cavallo, Y. B. Pan, R. Kowalewski, A. J.S. Smith, Olga Igonkina, I. Ofte, W. T. Ford, Tim Adye, R. D. Kass, G. Mancinelli, K. Goetzen, J. P. Burke, E. Torrence, P. David, A. Santroni, Virginia Azzolini, G. W. Brandenburg, R. Messner, G. Rong, V. Eschenburg, P. Taras, Janice Button-Shafer, M. Gaspero, G. Nesom, J. P. Coleman, G. R. Bonneaud, J. Dorfan, L. Del Buono, A. M. Boyarski, R. Eckmann, K. A. Ulmer, E. J. Hill, Francesco Fabozzi, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, G. Vasileiadis, Matteo Rama, N. Arnaud, S. Prell, Jie Zhang, James H Cochran, D. D. Altenburg, B. Lewandowski, A. Soffer, B. Mayer, A. K. Yarritu, F. Gallo, I. M. Peruzzi, T. W. Beck, F. Bianchi, T. M. Hong, D. D. Brown, A. E. Rubin, D. Hufnagel, Pu Wang, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, M. Pappagallo, and P. Poropat

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, media_common.quotation_subject, 01 natural sciences, Asymmetry, Particle identification, Crystallography, Particle decay, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, 0103 physical sciences, D meson, B meson, 010306 general physics, media_common
Abstract

The authors report the observation of the decay B{sup -} {yields} D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}}K{sup -}, where D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}} indicates a neutral D meson detected in the final state {pi}{sup +}{pi}{sup -}{pi}{sup 0}, excluding K{sub S}{sup 0}{pi}{sup 0}. This doubly Cabibbo-suppressed decay chain can be used to measure the CKM phase {gamma}. Using about 229 million e{sup +}e{sup -} {yields} B{bar B} events recorded by the BABAR experiment at the PEP-II e{sup +}e{sup -} storage ring, they measure the branching fraction {Beta}(B{sup -} {yields} D{sub {pi}{sup +}{pi}{sup -}{pi}{sup 0}K{sup -}}) = (5.5 {+-} 1.0 (stat.) {+-} 0.7 (syst.)) x 10{sup -6} and the decay rate asymmetry A = -0.02 {+-} 0.16 (stat.) {+-} 0.03 (syst.) for the full decay chain.

Published
2005

44. Study of theτ−→3h−2h+ντdecay

Author

M. S. Gill, P. Grenier, Roberto Covarelli, R. W. Kadel, D. E. Hutchcroft, J. M. Bauer, A. Palano, S. Schenk, C. Dallapiccola, Ch De La Vaissière, J. J. Hollar, T. Schalk, H. R. Band, J. Kroseberg, W. S. Lockman, Q. L. Zeng, Colin Jessop, R. Prepost, M. A. Mazzoni, G. Wormser, R. Liu, J. Chauveau, M. R. Convery, G. Schott, C. Gatto, T. Schroeder, G. Cavoto, C. M. Cormack, G. Vuagnin, M. Bondioli, R. Nogowski, W. Kozanecki, Xiang Li, A. W. Weidemann, Denis Bernard, Markus Cristinziani, G. Graziani, Douglas Wright, P. J. Oddone, H. J. Bulten, C. D. Buchanan, W. Dunwoodie, V. B. Golubev, A. Roodman, G. Therin, J. A. Kadyk, Chunhui Chen, D. Bettoni, T. Pulliam, D. Monorchio, T. Cuhadar-Donszelmann, A. N. Yushkov, B. Franek, N. A. Roe, G. P. Dubois-Felsmann, Maurizio Pierini, A. Olivas, I. J. Forster, D. Côté, S. Bailey, H. Marsiske, E. A. Kravchenko, M. Weaver, F. X. Yumiceva, M. M. Macri, J. L. Ritchie, Sai-Juan Chen, A. M. Lutz, I. Kitayama, S. J. Sekula, M. Bruinsma, W. J. Wisniewski, J. E. Sundermann, A. Jawahery, Roland Waldi, S. Passaggio, S. D. Foulkes, F. Ferroni, G. Cibinetto, R. G. Jacobsen, C. Touramanis, A. W. Borgland, Julie Malcles, V. B. Koptchev, R. Baldini-Ferroli, A. P. Onuchin, A. Chen, B. A. Petersen, C. L. Brown, W. Bhimji, D. Kirkby, G. Vasseur, G. Blaylock, F. Di Lodovico, Bernard Aubert, James R. Wilson, F. Blanc, E. Maly, M. Steinke, K. Yi, D. Dong, C. K. Lae, M. Verderi, A. K. Mohapatra, D. J. Payne, U. Nauenberg, H. W. Zhao, P. D. Dauncey, S. Ahmed, D. Gamba, S. Schrenk, G. J. Grenier, Mohamed H. Ahmed, M. Pripstein, V. Lepeltier, G. Rizzo, H. K. Hadavand, D. J. Bard, Peter Elmer, R. Frey, D. A. Bowerman, Paul Fraser Harrison, M. H. Kelsey, G. Benelli, E. Won, N. De Groot, T. Hadig, J. A. McKenna, E. O. Olaiya, Y. S. Zhu, Mirco Andreotti, Marcello Rotondo, H. U. Flaecher, A. Zghiche, H. Kagan, R. J. Wilson, J. R. Gaillard, E. Chen, Q. H. Guo, B. Stugu, D. S. Best, G. Wagner, Matteo Rama, T. Held, K. E. Ford, M. A. Saeed, L. Li Gioi, M. C. Hodgkinson, A. Oyanguren, Enrico Robutti, U. Mallik, U. Langenegger, S. Otto, A. Samuel, S. A. Majewski, L. M. Cremaldi, O. Hamon, D. Dujmic, N. R. Barlow, C. H. Cheng, F. Palombo, P. M. Patel, Vivek Sharma, Silvano Tosi, C. Cartaro, T. Abe, M. Benayoun, A. Höcker, G. Marchiori, A. B. Breon, James D. Olsen, J. H. von Wimmersperg-Toeller, M. Battaglia, G. Eigen, R. Bartoldus, L. M. Mir, T. R. McMahon, T. Piatenko, V. Halyo, E. I. Rosenberg, J. W. Berryhill, K. Peters, S. Ricciardi, Stephen Robert Wagner, Alexis Pompili, Tetiana Hryn'ova, J.H. Panetta, F. Safai Tehrani, S. Prell, J. R. Fry, L. Gladney, K. R. Schubert, L. T. Kerth, Y. Karyotakis, J. P. Lees, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, Nicola Cavallo, Jie Zhang, S. E. Morgan, C. T. Day, Brandon L. Hartfiel, M. C. Simani, S. Playfer, C. P. O'Grady, W. Roethel, M. Dickopp, F. Le Diberder, F. Anulli, S. Dittongo, M. Lu, Marcella Bona, L.M. Zhang, R. Andreassen, John Allison, Akram Khan, M. A. Baak, James H Cochran, B. Lewandowski, J. R. Johnson, M. Carpinelli, M. T. Naisbit, Lydia Roos, J. D. Richman, M. Morganti, J. Strube, V. N. Ivanchenko, D. G. Hitlin, E. Grauges, P. Rankin, C. T. Potter, R. de Sangro, S. L. Wu, K. T. Flood, Mario Giorgi, M. Pioppi, J. Schwiening, Liliana Teodorescu, A. M. Eichenbaum, S. H. Robertson, S. Ye, B. Cheng, V. E. Blinov, L. Piemontese, J. M. Thompson, R. L. Flack, A. Soffer, P. S. Jackson, Mauro Morandin, T. C. Petersen, A. J. Bevan, B. Spaan, Olga Igonkina, A. V. Telnov, S. Morganti, C. M. Hawkes, K. Koeneke, W. T. Ford, Tim Adye, R. D. Kass, S. Brunet, T. J. Orimoto, D. Fortin, Bruce Schumm, R. Aleksan, F. Gallo, Sridhara Dasu, S. Emery, V. Klose, X. C. Lou, J. J. Walsh, J. Brose, J. Schubert, A. M. Rahimi, T. E. Latham, R. Ter-Antonyan, Paul Jackson, Herbert Koch, Pierluigi Paolucci, Davide Piccolo, S. Saremi, F. Muheim, H. Briand, A. D. Bukin, W. H. Toki, J. Marks, A. Calcaterra, Nicola Neri, L. Lanceri, Amir Farbin, G. A. Cowan, A. Lu, V. Eyges, Zongfu Yu, S. Christ, J. M. Roney, G. S. Abrams, B. Viaud, Luca Lista, D. N. Brown, Corrado Angelini, D. W. G. S. Leith, N. Danielson, F. Galeazzi, W. N. Cottingham, Nicolas Berger, S. M. Spanier, Stéphane Plaszczynski, R. K. Yamamoto, H. L. Snoek, A. A. Salnikov, P. Kim, E. Gabathuler, W. R. Innes, A. Lazzaro, D. Su, Roberto Calabrese, B. C. Shen, B. Bhuyan, A. M. Eisner, Hui Li, C. A. Heusch, C. Roat, V. E. Ozcan, V. Poireau, F. C. Porter, K. K. Gan, Maurizio Biasini, K. A. George, S. Bettarini, M. G. Green, A. J. Hart, B. N. Ratcliff, F. Bucci, J. G. Smith, J. Ocariz, N. D. Qi, D. P. Stoker, T. M. Hong, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, Yuehong Xie, M. J. Charles, L. Bosisio, A. J. Edwards, A. Zallo, G. Calderini, M. B. Nikolich, O. L. Buchmueller, R. Contri, G. D. Lafferty, P. C. Bloom, R. Messner, M. Davier, R. Schwierz, Hyun-Chul Kim, A. Hauke, K. Suzuki, T. J. Harrison, J. W. Gary, F. Couderc, F. Colecchia, V. Lombardo, J. Va'vra, Y. P. Lau, G. Rong, N. S. Knecht, R. Claus, W. D. Hulsbergen, M. V. Purohit, J. C. Dingfelder, M. Piccolo, M. T. Allen, P. Patteri, P. Roudeau, Owen Rosser Long, V. Eschenburg, Matteo Negrini, Paul Kyberd, Bruce Mellado, D. del Re, A. Seiden, C. Voci, V. P. Druzhinin, C. Bozzi, A. J.S. Smith, M. Wittgen, H. Nicholson, J.J. Reidy, G. B. Mohanty, J. Stelzer, Martino Margoni, U. Egede, S. F. Ganzhur, Crisostomo Sciacca, D. Aston, R. Capra, G. Mancinelli, P. Taras, E. P. Solodov, M. Zito, G. W. Morton, A. E. Blinov, G. Sciolla, R. S. Dubitzky, H. P. Paar, J. E. Brau, Eleonora Luppi, K. Honscheid, C. A. Chavez, A. Gaidot, Justin Albert, S. Rodier, S. J. Gowdy, G. P. Gopal, J. A. Ernst, C. C. Young, W. T. Meyer, K. Goetzen, J. L. Harton, X. Giroux, V. Lillard, M. H. Schune, U. Uwer, T. B. Moore, A. Buzzo, T. Brandt, R. Stroili, H. A. Neal, G. Batignani, Amanda Weinstein, B. T. Meadows, W. Gradl, S. Jayatilleke, G. Raven, J. M. LoSecco, M. Gaspero, J. I. Yi, J. P. Burke, E. Torrence, M. D. Sokoloff, C. M. Brown, M. Saleem, P. David, M. L. Perl, N. B. Sinev, P. R. Burchat, R. J. Barlow, A. Ryd, J. T. Boyd, Joseph Izen, J. A. Nash, M. Datta, R. Barate, Wouter Verkerke, N. Chevalier, M. Posocco, Sw. Banerjee, R. C. Field, F. Salvatore, Pierre-Francois Giraud, A. Santroni, Virginia Azzolini, J. J. Back, Ch Thiebaux, G. Nesom, M. K. Sullivan, J. P. Coleman, G. Finocchiaro, V. Luth, Yu. G. Kolomensky, M. Lo Vetere, M. G. Wilson, D. A. Roberts, F. E. Taylor, M. G. Greene, A. D'Orazio, M. Mandelkern, M. S. Alam, G. Grosdidier, A. Snyder, H. Staengle, T. S. Mattison, D. A. Sanders, F. F. Wilson, P. Tan, M. T. Graham, L. Del Buono, C. Hast, R. Eckmann, Francesco Polci, T. Glanzman, H. B. Crawley, R. F. Schwitters, D. B. MacFarlane, S. Willocq, G. Della Ricca, H. Schröder, M. Pelizaeus, D. J. Lange, G. Piredda, S. Luitz, P. J. Clark, A. Dvoretskii, J. C. Chen, M. Morii, D. C. Williams, F. Bellini, Y. B. Pan, R. Kowalewski, M. Chao, Ch Yèche, R. K. Mommsen, Kenji Hamano, G. Kukartsev, R. N. Cahn, F. R. Wappler, G. P. Taylor, K. A. Ulmer, Maria Roberta Monge, A. Mihalyi, E. Paoloni, Sh. Rahatlou, I. Ofte, P. Spradlin, X. R. Chen, M. T. Ronan, G. W. London, K. Paick, G. W. Brandenburg, M. J.J. John, S. Pacetti, A. Dorigo, S. B. Zain, G. De Nardo, JunJie Wu, M. A. Mazur, R. J. Parry, R. Cowan, E. Di Marco, Francesco Fabozzi, D. H. Wright, G. Vasileiadis, C. Patrignani, A. Cunha, V. Tisserand, C. Lu, D. Judd, C. J. Flacco, I. Narsky, A. Satpathy, M. Fritsch, F. Simonetto, R. H. Schindler, Shanhui Fan, S. S. Hertzbach, Y. Groysman, L. Wilden, G. Lynch, M. L. Kocian, W. A. Wenzel, R. Kroeger, R. R. Kofler, M. Krishnamurthy, D. E. Wagoner, W. O. Ruddick, Gabriele Simi, C. L. Davis, D. Boutigny, R. Gamet, A. T. Watson, M. Haire, J. C. Williams, B. Dahmes, J. Libby, K. Wang, C. Hearty, A. Stocchi, I. Eschrich, Claudio Campagnari, E. A. Eckhart, F. Forti, D. J. Summers, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, L. Vitale, F. Martinez-Vidal, Dominik Müller, Q. K. Wong, M. Legendre, R. Godang, Janice Button-Shafer, H. M. Lacker, H. L. Lynch, G. R. Bonneaud, M. P. Kelly, J. Dorfan, M. Barrett, A. M. Boyarski, D. M. Strom, K. S. Chaisanguanthum, E. Charles, Fabio Cossutti, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Yu I. Skovpen, Ph Leruste, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, M. Pappagallo, P. Poropat, I. M. Peruzzi, T. W. Beck, S. I. Serednyakov, F. Bianchi, E. Feltresi, D. D. Brown, A. E. Rubin, D. Hufnagel, Pu Wang, and A. V. Gritsan

Subjects
Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Resonance, 01 natural sciences, Particle identification, Nuclear physics, Pion, Phase space, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics
Abstract

The branching fraction of the tau- --> 3h- 2h+ nu decay (h= pi, kaon) is measured with the BaBar detector to be (8.56 +/- 0.05 +/- 0.42)E-04 where the first error is statistical and the second systematic. The observed structure of this decay is significantly different from the phase space prediction, with the rho resonance playing a strong role. The decay tau- --> f1 pi nu with the f1 meson decaying to four charged pions, is observed and the branching fraction is measured to be (3.9 +/- 0.7 +/- 0.5)E-04.

Published
2005

45. Dalitz plot analysis ofD0→K¯0K+K−

Author

B. Spaan, H. Briand, A. D. Bukin, L. Lanceri, Stéphane Plaszczynski, R. C. Field, F. Salvatore, V. Halyo, G. Finocchiaro, V. Luth, M. S. Alam, R. Messner, J. Libby, A. J. Edwards, M. Spitznagel, B. N. Ratcliff, S. Ricciardi, N. D. Qi, R. Schwierz, Alexis Pompili, Tetiana Hryn'ova, A. Snyder, F. F. Wilson, M. Zito, A. E. Blinov, C. C. Young, W. T. Meyer, L. Gladney, P. C. Bloom, K. Wang, G. Rong, V. Eschenburg, A. Stocchi, S. J. Gowdy, K. T. Flood, S. Saremi, Hyun-Chul Kim, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, A. Gaidot, Maurizio Biasini, R. Sacco, F. Le Diberder, Marcella Bona, V. Lillard, J. L. Ritchie, I. Kitayama, Corrado Angelini, G. P. Gopal, Mauro Morandin, A. J. Bevan, B. Bhuyan, I. Eschrich, K. Suzuki, F. Muheim, N. S. Knecht, R. Contri, P. Taras, E. P. Solodov, Amanda Weinstein, H. L. Snoek, Yuehong Xie, S. Emery, J. D. Richman, V. Lombardo, F. Di Lodovico, Bernard Aubert, Claudio Campagnari, T. S. Mattison, D. A. Sanders, R. Barate, M. Macri, Nicolas Berger, D. A. Hopkins, S. M. Spanier, Y. P. Lau, A. K. Mohapatra, D. J. Payne, Ch Yèche, A. J.S. Smith, U. Nauenberg, P. Tan, Sw. Banerjee, R. Liu, Owen Rosser Long, A. Seiden, Paul Kyberd, A. Samuel, C. Hast, V. B. Golubev, G. P. Taylor, D. J. Lange, M. G. Wilson, G. Piredda, G. Kukartsev, T. J. Orimoto, D. Fortin, A. W. Weidemann, A. Dvoretskii, J. C. Chen, M. Morii, T. Schalk, Silvano Tosi, H. Nicholson, Martino Margoni, J. Marks, D. A. Roberts, F. E. Taylor, V. Lepeltier, G. Grosdidier, M. T. Graham, O. L. Buchmueller, F. Forti, G. A. Cowan, U. Egede, M. Gaspero, G. Nesom, P. Grenier, M. J.J. John, R. Aleksan, S. B. Zain, D. E. Hutchcroft, J. M. Bauer, F. R. Wappler, Sh. Rahatlou, C. Dallapiccola, P. S. Jackson, Ch De La Vaissière, G. Sciolla, A. Satpathy, G. Therin, M. A. Mazzoni, G. Wormser, G. Mancinelli, T. Glanzman, R. F. Schwitters, R. N. Cahn, Maria Roberta Monge, J. P. Coleman, V. P. Druzhinin, G. B. Mohanty, J. A. Ernst, C. Bozzi, Maurizio Pierini, W. Kozanecki, P. Kim, M. Benayoun, J. J. Hollar, A. Mihalyi, H. Kagan, G. De Nardo, C. Gatto, S. F. Ganzhur, H. R. Band, W. S. Lockman, H. J. Bulten, M. Saleem, D. B. MacFarlane, J. M. Roney, H. B. Crawley, J. Stelzer, Luca Lista, K. Goetzen, L. Del Buono, C. Lu, D. Judd, Q. L. Zeng, F. Bucci, K. A. George, J. G. Smith, K. Honscheid, D. S. Best, M. Fritsch, C. A. Chavez, S. S. Hertzbach, R. Eckmann, S. Playfer, E. Paoloni, R. Capra, Y. Groysman, T. Schroeder, C. P. O'Grady, C. J. Flacco, M. R. Convery, B. T. Meadows, G. Schott, M. B. Nikolich, A. N. Yushkov, G. W. Morton, P. J. Clark, L. M. Mir, T. R. McMahon, T. Piatenko, L. Wilden, P. Spradlin, G. Raven, Akram Khan, J. I. Yi, M. D. Sokoloff, C. M. Brown, G. Lynch, M. L. Perl, J. P. Burke, E. Torrence, M. Datta, X. R. Chen, M. A. Baak, A. V. Telnov, Wouter Verkerke, A. Buzzo, W. Dunwoodie, P. J. Oddone, J. T. Boyd, P. R. Burchat, Joseph Izen, P. David, M. H. Schune, U. Uwer, C. K. Lae, M. L. Kocian, K. Koeneke, M. T. Ronan, G. Rizzo, R. Bartoldus, H. Schröder, T. Brandt, O. Hamon, S. Luitz, P. F. Giraud, J. C. Dingfelder, R. J. Barlow, Wp Vazquez, D. C. Williams, M. Pioppi, W. A. Wenzel, E. Grauges, P. Roudeau, C. T. Potter, Mario Giorgi, R. K. Mommsen, J. J. Back, A. Santroni, Virginia Azzolini, V. Eyges, Zongfu Yu, Ch Thiebaux, B. Franek, H. Staengle, R. Stroili, H. A. Neal, K. A. Ulmer, M. Verderi, M. J. Charles, B. Cheng, S. Morganti, N. Chevalier, R. G. Jacobsen, M. Posocco, M. Chao, L. Li Gioi, Sridhara Dasu, J. A. McKenna, V. E. Blinov, N. A. Roe, G. P. Dubois-Felsmann, T. Hadig, Enrico Robutti, M. Mandelkern, V. B. Koptchev, A. Roodman, Kenji Hamano, D. del Re, R. R. Kofler, M. Krishnamurthy, T. Pulliam, U. Mallik, Marcello Rotondo, S. Ahmed, D. Gamba, S. Schrenk, E. Feltresi, C. Cartaro, A. Ryd, Nicola Cavallo, D. E. Wagoner, W. O. Ruddick, Gabriele Simi, A. Lazzaro, D. Su, H. U. Flaecher, A. Zghiche, R. J. Wilson, L. M. Cremaldi, T. Cuhadar-Donszelmann, R. Cenci, J. A. Nash, V. Poireau, C. Touramanis, C. L. Davis, R. Gamet, Francesco Fabozzi, Roland Waldi, E. Chen, Q. H. Guo, B. Stugu, G. Vasileiadis, Matteo Rama, A. Zallo, T. Held, K. E. Ford, Olga Igonkina, M. Lo Vetere, F. Ferroni, W. T. Ford, Tim Adye, M. Piccolo, F. Couderc, D. Dujmic, M. Haire, M. T. Allen, G. W. Brandenburg, J. C. Williams, D. W. G. S. Leith, W. N. Cottingham, G. Marchiori, R. D. Kass, S. Rodier, Francesco Polci, S. K. Swain, John Allison, S. Bettarini, S. Prell, A. Dorigo, JunJie Wu, R. Frey, M. Pelizaeus, G. Batignani, W. Gradl, L.M. Zhang, B. Dahmes, B. C. Shen, M. H. Kelsey, S. Pacetti, R. Cowan, M. A. Mazur, T. Abe, G. Calderini, Jie Zhang, James H Cochran, B. Lewandowski, D. G. Hitlin, P. Rankin, S. Ye, Justin Albert, J. P. Lees, R. J. Parry, T. C. Petersen, F. Bellini, Julie Malcles, D. A. Bowerman, Paul Fraser Harrison, A. Soffer, E. Di Marco, R. Ter-Antonyan, T. B. Moore, J. R. Johnson, S. Jayatilleke, M. Pripstein, F. Gallo, I. Narsky, Nicola Neri, Bruce Schumm, J. Schubert, Davide Piccolo, D. H. Wright, G. Benelli, A. Hauke, E. O. Olaiya, Colin Jessop, C. Patrignani, J. Ocariz, R. Prepost, D. Monorchio, R. Nogowski, M. A. Saeed, S. Willocq, T. M. Hong, H. W. Zhao, P. M. Patel, P. D. Dauncey, G. Della Ricca, N. R. Barlow, A. Cunha, F. Palombo, Y. B. Pan, V. Tisserand, Xiang Li, Mirco Andreotti, T. J. Harrison, J. W. Gary, C. D. Buchanan, Stephen Robert Wagner, J.H. Panetta, J. Va'vra, R. Kowalewski, Vivek Sharma, A. J. Hart, V. E. Ozcan, James D. Olsen, J.J. Reidy, L. Bosisio, I. Ofte, R. S. Dubitzky, J. M. LoSecco, A. Olivas, E. A. Kravchenko, M. Weaver, N. B. Sinev, W. Roethel, J. Strube, S. A. Majewski, Y. Karyotakis, L. T. Kerth, James R. Wilson, K. R. Schubert, R. Baldini-Ferroli, W. Bhimji, D. Kirkby, G. Vasseur, M. Carpinelli, M. T. Naisbit, Lydia Roos, C. M. Hawkes, M. Steinke, K. Yi, K. C. Schofield, Mohamed H. Ahmed, L. Piemontese, Amir Farbin, A. A. Salnikov, U. Langenegger, G. Eigen, M. Morganti, F. Safai Tehrani, E. Gabathuler, W. R. Innes, F. C. Porter, R. K. Yamamoto, M. G. Green, M. Davier, A. M. Eisner, Hui Li, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, W. D. Hulsbergen, M. V. Purohit, Bruce Mellado, M. Wittgen, N. De Groot, C. H. Cheng, A. Höcker, J. R. Fry, R. de Sangro, S. L. Wu, S. Brunet, W. H. Toki, Janice Button-Shafer, G. R. Bonneaud, J. Dorfan, A. M. Boyarski, D. Bettoni, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, I. M. Peruzzi, T. W. Beck, S. I. Serednyakov, F. Bianchi, D. D. Brown, A. E. Rubin, D. Côté, S. Bailey, D. Hufnagel, Pu Wang, H. Marsiske, F. Simonetto, W. F. Mader, R. H. Schindler, Shanhui Fan, W. M. Bugg, D. Kovalskyi, J. M. Thompson, R. Kroeger, D. Boutigny, Sai-Juan Chen, Alberto Lusiani, A. T. Watson, A. M. Lutz, M. Pappagallo, M. Bruinsma, W. J. Wisniewski, C. Hearty, E. A. Eckhart, Paul Jackson, D. J. Summers, B. G. Fulsom, J. E. Sundermann, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, L. Vitale, F. Martinez-Vidal, Dominik Müller, Q. K. Wong, S. Passaggio, E. Luppi, R. Godang, H. M. Lacker, H. L. Lynch, M. P. Kelly, M. Barrett, D. M. Strom, K. S. Chaisanguanthum, E. Charles, Fabio Cossutti, S. J. Sekula, Yu I. Skovpen, A. Jawahery, S. D. Foulkes, G. Cibinetto, A. P. Onuchin, A. Chen, B. A. Petersen, C. L. Brown, A. V. Gritsan, M. S. Gill, Roberto Covarelli, R. W. Kadel, A. Palano, S. Schenk, J. Kroseberg, G. Cavoto, J. Chauveau, C. M. Cormack, M. Bondioli, Denis Bernard, S. H. Robertson, V. Klose, J. A. Kadyk, Chunhui Chen, Herbert Koch, B. Viaud, D. Dong, E. Won, Douglas Wright, Y. S. Zhu, P. Patteri, Peter Elmer, J. R. Gaillard, G. W. London, A. B. Breon, I. J. Forster, G. Wagner, K. Peters, M. Lu, S. E. Morgan, H. K. Hadavand, A. M. Eichenbaum, M. Dickopp, M. Legendre, J. W. Berryhill, R. Andreassen, Pierluigi Paolucci, R. Calabrese, N. Danielson, D. J. Bard, C. A. Heusch, F. Galeazzi, K. K. Gan, J. Schwiening, C. Voci, Crisostomo Sciacca, D. Aston, J. H. von Wimmersperg-Toeller, M. Battaglia, Liliana Teodorescu, X. C. Lou, J. J. Walsh, A. M. Rahimi, T. E. Latham, Markus Cristinziani, F. X. Yumiceva, G. S. Abrams, G. Blaylock, D. N. Brown, H. P. Paar, J. E. Brau, M. K. Sullivan, X. Giroux, A. D'Orazio, G. D. Lafferty, F. Blanc, M. C. Hodgkinson, A. Oyanguren, G. Graziani, Yu. G. Kolomensky, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, M. C. Simani, F. Anulli, S. Dittongo, R. L. Flack, J. Brose, A. Calcaterra, C. Roat, D. P. Stoker, R. Claus, Matteo Negrini, and S. Otto

Subjects
Hadronic decay, Physics, Nuclear and High Energy Physics, Annihilation, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, Dalitz plot, 01 natural sciences, Particle identification, Nuclear physics, 0103 physical sciences, 010306 general physics
Abstract

A Dalitz plot analysis of approximately 12500 D0 events reconstructed in the hadronic decay D0-->K0bar K+ K- is presented. This analysis is based on a data sample of 91.5 fb-1 collected with the BaBar detector at the PEP-II asymmetric-energy e+ e- storage rings at SLAC running at center-of-mass energies on and 40 MeV below the Y4S resonance. The events are selected from e+ e- --> c cbar annihilations using the decay D*+ --> D0 pi+. The following ratio of branching fractions has been obtained: BR = Gamma(D0-->K0bar K+ K-)/Gamma(D0-->K0bar pi+ pi-) = (15.8+/-0.1(stat.)+/-0.5(syst.)x 10-2 Estimates of fractions and phases for resonant and non-resonant contributions to the Dalitz plot are also presented. The a0(980)-->K Kbar projection has been extracted with little background. A search for CP asymmetries on the Dalitz plot has been performed.

Published
2005

46. Search for the rare decayB¯0→D*0γ

Author

Colin Jessop, R. Prepost, R. Nogowski, J. P. Lees, C. D. Buchanan, L. Del Buono, A. Olivas, R. Eckmann, M. Weaver, J. M. Thompson, H. Schröder, S. Luitz, R. Baldini-Ferroli, A. W. Weidemann, D. C. Williams, Markus Cristinziani, A. Khan, W. Bhimji, D. Kirkby, Paul Jackson, G. Vasseur, K. A. Ulmer, M. Chao, H. J. Bulten, F. X. Yumiceva, Kenji Hamano, Mauro Morandin, A. J. Bevan, S. Yang, F. Muheim, Janice Button-Shafer, G. Blaylock, J. M. Roney, Luca Lista, P. C. Bloom, Francesco Fabozzi, G. Vasileiadis, J. Stelzer, G. W. Brandenburg, Nicolas Berger, S. M. Spanier, G. R. Bonneaud, J. Dorfan, A. N. Yushkov, K. A. George, J. G. Smith, Corrado Angelini, B. Bhuyan, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, D. J. Bard, F. Simonetto, R. H. Schindler, N. S. Knecht, M. Pappagallo, Matteo Rama, J. Brose, Shanhui Fan, P. Poropat, C. A. Heusch, S. Prell, D. Côté, S. Bailey, A. Calcaterra, B. T. Meadows, Jie Zhang, Paul Kyberd, S. Bettarini, J. L. Ritchie, A. M. Boyarski, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, Ph Leruste, N. Arnaud, S. J. Gowdy, D. D. Altenburg, B. Mayer, A. K. Yarritu, James H Cochran, T. Cuhadar-Donszelmann, V. B. Golubev, C. Touramanis, G. Raven, J. I. Yi, M. D. Sokoloff, C. M. Brown, M. B. Nikolich, M. Saleem, O. L. Buchmueller, B. Lewandowski, I. Kitayama, S. I. Serednyakov, H. Marsiske, A. Soffer, C. Roat, V. Lillard, V. P. Druzhinin, C. Bozzi, E. A. Kravchenko, R. Capra, H. K. Hadavand, G. Therin, R. Kroeger, P. R. Burchat, R. Barate, D. Boutigny, D. S. Best, F. Gallo, R. Bartoldus, G. W. Morton, U. Uwer, Roberto Calabrese, B. C. Shen, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, N. De Groot, C. H. Cheng, D. P. Stoker, A. W. Borgland, T. Brandt, L. M. Mir, T. R. McMahon, T. Piatenko, T. B. Moore, A. T. Watson, R. Stroili, H. A. Neal, Achille Stocchi, T. W. Beck, F. Bianchi, C. Voci, Sai-Juan Chen, Sw. Banerjee, K. Honscheid, C. A. Chavez, A. Buzzo, R. J. Barlow, J. W. Berryhill, E. Feltresi, D. D. Brown, A. E. Rubin, I. M. Peruzzi, D. Hufnagel, Pu Wang, Julie Malcles, J. R. Fry, Crisostomo Sciacca, D. Aston, A. M. Lutz, M. Bruinsma, W. J. Wisniewski, T. Held, K. E. Ford, A. Ryd, E. Maly, Marcello Rotondo, H. U. Flaecher, A. Zghiche, E. Grauges, N. Chevalier, R. Andreassen, M. Posocco, T. M. Hong, R. Claus, P. Grenier, D. E. Hutchcroft, J. M. Bauer, Matteo Negrini, C. Dallapiccola, Ch De La Vaissière, J. Ocariz, J. J. Hollar, V. Halyo, C. K. Lae, S. F. Ganzhur, H. R. Band, C. T. Potter, C. Hearty, Mario Giorgi, S. Rodier, J. E. Sundermann, R. R. Kofler, H. B. Crawley, Douglas Wright, M. Krishnamurthy, R. J. Wilson, V. Eyges, Zongfu Yu, G. Rizzo, B. N. Ratcliff, L. M. Cremaldi, E. A. Eckhart, D. J. Summers, A. Gaidot, R. de Sangro, S. Morganti, James R. Wilson, Sridhara Dasu, M. G. Wilson, Pierluigi Paolucci, D. A. Roberts, N. Danielson, W. Roethel, M. J. Charles, I. J. Forster, W. S. Lockman, J. A. McKenna, R. Messner, Q. L. Zeng, M. Steinke, Peter Elmer, D. E. Wagoner, G. Wagner, G. Rong, W. O. Ruddick, Gabriele Simi, M. R. Convery, V. Eschenburg, Mohamed H. Ahmed, M. Pripstein, L. Piemontese, R. L. Flack, D. Monorchio, R. Contri, T. C. Petersen, L. Gladney, R. K. Yamamoto, S. L. Wu, G. P. Gopal, S. Passaggio, C. L. Davis, F. Galeazzi, K. K. Gan, U. Langenegger, F. E. Taylor, G. Grosdidier, Bruce Schumm, G. Schott, P. Taras, P. J. Oddone, M. T. Graham, T. S. Mattison, D. A. Sanders, K. Peters, P. Tan, D. del Re, R. Gamet, C. Hast, H. W. Zhao, P. D. Dauncey, G. J. Grenier, Mirco Andreotti, M. Haire, Amanda Weinstein, J. C. Williams, S. Emery, L.M. Zhang, A. Zallo, N. D. Qi, F. Couderc, R. Schwierz, F. Colecchia, D. J. Lange, E. Gabathuler, W. R. Innes, A. Lu, F. C. Porter, M. G. Green, M. Lu, M. Zito, G. Benelli, E. O. Olaiya, M. A. Saeed, N. R. Barlow, F. Palombo, M. Verderi, A. J. Hart, Vivek Sharma, J. H. von Wimmersperg-Toeller, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, L. Vitale, F. Martinez-Vidal, Dominik Müller, Stéphane Plaszczynski, T. Hadig, P. Patteri, V. Lepeltier, M. Benayoun, M. Gaspero, G. Nesom, J. P. Coleman, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, F. Le Diberder, Marcella Bona, J. D. Richman, T. J. Harrison, J. W. Gary, Q. K. Wong, S. Brunet, W. H. Toki, J. Va'vra, J.J. Reidy, James D. Olsen, A. M. Eisner, Eleonora Luppi, G. Eigen, F. Safai Tehrani, A. V. Gritsan, M. S. Gill, Roberto Covarelli, R. W. Kadel, F. Di Lodovico, Bernard Aubert, B. Dahmes, D. G. Hitlin, P. Rankin, A. K. Mohapatra, Justin Albert, M. Davier, A. E. Blinov, Enrico Robutti, C. C. Young, L. Bosisio, A. M. Eichenbaum, V. Lombardo, U. Mallik, D. J. Payne, W. T. Meyer, A. Palano, C. Cartaro, S. Jayatilleke, S. Ye, Hui Li, L. T. Kerth, R. S. Dubitzky, Sergio Grancagnolo, P. J. Clark, A. Satpathy, R. Ter-Antonyan, J. A. Nash, M. Lo Vetere, U. Nauenberg, G. Piredda, A. Dvoretskii, J. C. Chen, Francesco Polci, M. Morii, F. R. Wappler, E. P. Solodov, S. Schenk, Marie Helene Schune, John Allison, R. Godang, A. Petzold, H. M. Lacker, H. L. Lynch, J. M. LoSecco, G. Hamel de Monchenault, R. S. Panvini, T. Glanzman, W. D. Hulsbergen, R. K. Mommsen, N. B. Sinev, H. P. Paar, J. E. Brau, Sh. Rahatlou, Nicola Neri, A. Samuel, Silvano Tosi, H. Kagan, R. C. Field, M. V. Purohit, M. Fritsch, S. A. Majewski, Bruce Mellado, R. F. Schwitters, U. Egede, M. Pelizaeus, F. Salvatore, K. Paick, S. S. Hertzbach, T. Schalk, R. Liu, J. Schubert, Davide Piccolo, G. Sciolla, M. P. Kelly, G. Finocchiaro, M. Wittgen, M. Barrett, A. Dorigo, JunJie Wu, T. J. Orimoto, D. Fortin, Y. Groysman, L. Wilden, Y. Karyotakis, M. A. Mazur, S. Kazuhito, R. J. Parry, V. Luth, Alessio Sarti, J. Kroseberg, M. A. Mazzoni, G. Wormser, D. B. MacFarlane, S. Ricciardi, J. Marks, E. Di Marco, G. Cavoto, Alexis Pompili, Tetiana Hryn'ova, G. Vuagnin, G. Lynch, D. M. Strom, K. S. Chaisanguanthum, M. L. Kocian, S. Playfer, D. H. Wright, M. S. Alam, P. S. Jackson, V. N. Ivanchenko, C. Patrignani, A. Cunha, Yu. G. Kolomensky, F. Bellini, V. E. Ozcan, C. Gatto, W. A. Wenzel, V. Tisserand, E. Charles, Fabio Cossutti, C. P. O'Grady, W. Kozanecki, D. Bettoni, M. Pierini, A. Snyder, M. L. Perl, K. T. Flood, R. Cowan, G. A. Cowan, T. Schroeder, J. T. Boyd, Joseph Izen, Yu I. Skovpen, M. A. Baak, F. F. Wilson, A. V. Telnov, J. Libby, C. M. Hawkes, K. Koeneke, W. Dunwoodie, K. Wang, S. Saremi, Ch Yèche, Amir Farbin, B. Franek, A. A. Salnikov, I. Narsky, N. A. Roe, G. P. Dubois-Felsmann, I. Eschrich, P. Kim, A. Roodman, M. M. Macri, X. Giroux, S. J. Sekula, G. Kukartsev, S. Otto, T. Pulliam, A. Jawahery, S. D. Foulkes, G. Cibinetto, Claudio Campagnari, H. L. Snoek, Roland Waldi, F. Ferroni, F. Bucci, Yuehong Xie, F. Forti, A. P. Onuchin, Y. P. Lau, R. N. Cahn, M. K. Sullivan, A. Chen, B. A. Petersen, A. J.S. Smith, Maria Roberta Monge, A. Mihalyi, B. Spaan, D. A. Bowerman, C. L. Brown, Paul Fraser Harrison, H. Briand, A. D. Bukin, M. G. Greene, A. D'Orazio, A. Soha, M. Pioppi, B. Cheng, V. E. Blinov, P. M. Patel, L. Lanceri, Stephen Robert Wagner, J.H. Panetta, P. F. Giraud, E. Paoloni, J. C. Dingfelder, P. Roudeau, P. Spradlin, R. G. Jacobsen, K. R. Schubert, F. Blanc, V. B. Koptchev, X. R. Chen, M. T. Ronan, M. C. Hodgkinson, S. Ahmed, D. Gamba, S. Schrenk, G. Graziani, D. W. G. S. Leith, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, M. C. Simani, E. Chen, Q. H. Guo, B. Stugu, F. Anulli, W. N. Cottingham, S. Dittongo, S. H. Robertson, V. Klose, D. Dujmic, G. Marchiori, Herbert Koch, B. Viaud, G. Calderini, G. W. London, A. B. Breon, Maurizio Biasini, S. E. Morgan, M. Dickopp, M. Legendre, Owen Rosser Long, J. Schwiening, A. Seiden, G. B. Mohanty, Liliana Teodorescu, X. C. Lou, J. J. Walsh, J. A. Ernst, A. M. Rahimi, T. E. Latham, S. Christ, A. Höcker, G. S. Abrams, G. P. Taylor, M. J.J. John, R. Aleksan, D. N. Brown, G. De Nardo, C. Lu, D. Judd, M. Datta, Wouter Verkerke, C. J. Flacco, O. Hamon, J. J. Back, A. Lazzaro, D. Su, V. Poireau, Ch Thiebaux, H. Staengle, G. D. Lafferty, M. Piccolo, M. T. Allen, G. Batignani, J. Chauveau, W. Gradl, M. Mandelkern, C. M. Cormack, M. Bondioli, Denis Bernard, J. A. Kadyk, Chunhui Chen, D. Dong, S. Willocq, G. Della Ricca, E. Won, Y. S. Zhu, J. R. Gaillard, D. Thiessen, Y. B. Pan, R. Kowalewski, I. Ofte, R. Frey, M. H. Kelsey, T. Abe, J. R. Johnson, J. Strube, L. Li Gioi, Nicola Cavallo, Olga Igonkina, W. T. Ford, Tim Adye, R. D. Kass, G. Mancinelli, K. Goetzen, J. L. Harton, J. P. Burke, E. Torrence, P. David, A. Santroni, Virginia Azzolini, A. J. Edwards, Hyun-Chul Kim, A. Hauke, H. Nicholson, and Martino Margoni

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Research council, 0103 physical sciences, Library science, Christian ministry, Russian federation, 010306 general physics, 01 natural sciences, 7. Clean energy, Bildung
Abstract

SLAC for its support and the kind hospitality extended to them. This work is supported by the US Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), Institute of High Energy Physics (China), the Commissariat `a l’Energie Atomique and Institut National de Physique Nucl´eaire et de Physique des Particules (France), the Bundesministerium fu¨r Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Science and Technology of the Russian Federation, and the Particle Physics and Astronomy Research Council (United Kingdom).

Published
2005

47. Measurement of the time-dependentCP-violating asymmetry inB0→KS0π0γdecays

Author

W. F. Mader, R. H. Schindler, Shanhui Fan, W. Menges, R. Kroeger, D. Boutigny, A. T. Watson, T. S. Mattison, D. A. Sanders, P. Tan, M. M. Macri, S. J. Sekula, C. Hearty, A. Jawahery, E. A. Eckhart, D. J. Summers, B. G. Fulsom, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, L. Vitale, F. Martinez-Vidal, Dominik Müller, Q. K. Wong, S. D. Foulkes, G. Cibinetto, R. Godang, H. M. Lacker, H. L. Lynch, W. Roethel, J. Strube, L. Piemontese, M. Barrett, D. M. Strom, K. S. Chaisanguanthum, C. Hast, D. J. Lange, Michael Kelly, J. L. Ritchie, E. Charles, Fabio Cossutti, A. P. Onuchin, D. Bettoni, Yu I. Skovpen, G. Piredda, A. Dvoretskii, J. C. Chen, A. Chen, I. Kitayama, S. I. Serednyakov, H. K. Hadavand, E. Gabathuler, W. R. Innes, F. C. Porter, B. A. Petersen, C. L. Brown, M. Morii, F. R. Wappler, L. Li Gioi, Nicola Cavallo, V. Halyo, L. Gladney, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, J. W. Berryhill, R. Andreassen, Bruce Schumm, Pierluigi Paolucci, N. Danielson, Sh. Rahatlou, F. Galeazzi, A. Gaidot, K. K. Gan, F. Le Diberder, R. Cenci, A. Zallo, Julie Malcles, Marcella Bona, F. Couderc, J. D. Richman, A. J. Hart, Marcello Rotondo, M. Pripstein, G. Benelli, G. P. Gopal, Amanda Weinstein, H. U. Flaecher, A. Zghiche, R. J. Wilson, L. M. Cremaldi, E. O. Olaiya, L. Bosisio, Olga Igonkina, M. A. Saeed, Ch Yèche, T. J. Orimoto, D. Fortin, Eleonora Luppi, N. R. Barlow, F. Palombo, Junqiao Wu, Vivek Sharma, G. Kukartsev, A. Stocchi, R. N. Cahn, Markus Cristinziani, Maria Roberta Monge, James D. Olsen, S. K. Swain, Justin Albert, S. Jayatilleke, W. T. Ford, Tim Adye, S. Emery, J. Marks, A. Mihalyi, J. A. McKenna, R. D. Kass, E. Paoloni, L. T. Kerth, A. M. Eisner, G. A. Cowan, L.M. Zhang, F. X. Yumiceva, Hui Li, P. Spradlin, D. S. Best, X. R. Chen, M. T. Ronan, D. G. Hitlin, P. Rankin, S. Ye, R. Bartoldus, G. Blaylock, T. C. Petersen, L. M. Mir, T. R. McMahon, T. Piatenko, V. Eyges, Zongfu Yu, R. Ter-Antonyan, M. J. Charles, Janice Button-Shafer, Sergio Grancagnolo, H. Kim, D. del Re, A. Petzold, S. Rodier, Nicola Neri, G. Hamel de Monchenault, R. S. Panvini, J. A. Nash, M. Lo Vetere, Francesco Polci, G. R. Bonneaud, E. Grauges, P. J. Clark, Peter Elmer, M. Pelizaeus, G. Wagner, G. P. Taylor, Maurizio Biasini, C. T. Potter, Mario Giorgi, W. D. Hulsbergen, F. Bellini, A. V. Gritsan, R. K. Mommsen, M. S. Gill, K. Peters, M. J.J. John, R. Aleksan, S. B. Zain, M. V. Purohit, Owen Rosser Long, M. Lu, J. Dorfan, G. De Nardo, A. Seiden, A. Oyanguren, Roberto Covarelli, R. W. Kadel, S. Morganti, Sridhara Dasu, A. M. Eichenbaum, A. Palano, S. Bettarini, S. Schenk, C. Lu, D. Judd, Wp Vazquez, M. Pioppi, Bruce Mellado, C. J. Flacco, B. Cheng, V. E. Blinov, C. L. Edgar, T. Schalk, T. Cuhadar-Donszelmann, R. C. Field, F. Salvatore, A. M. Boyarski, M. A. Mazur, O. Hamon, M. A. Mazzoni, G. Wormser, M. Wittgen, J. F. Hirschauer, J. Kroseberg, G. Cavoto, G. Finocchiaro, V. Luth, E. Feltresi, R. J. Parry, E. Di Marco, C. Touramanis, C. Gatto, D. H. Wright, A. Lazzaro, C. A. Heusch, M. S. Alam, D. W. G. S. Leith, D. Su, T. Schroeder, V. Poireau, C. Patrignani, A. Cunha, W. N. Cottingham, D. Côté, V. Tisserand, A. Snyder, M. Piccolo, M. T. Allen, W. Dunwoodie, Matteo Rama, B. Franek, H. Marsiske, F. F. Wilson, E. A. Kravchenko, G. Grosdidier, G. Calderini, G. Batignani, N. A. Roe, G. P. Dubois-Felsmann, W. Gradl, S. Prell, Sai-Juan Chen, S. J. Gowdy, C. Voci, M. Mandelkern, M. Bruinsma, Jie Zhang, R. Liu, R. G. Jacobsen, W. J. Wisniewski, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, J. E. Sundermann, James H Cochran, Crisostomo Sciacca, D. Aston, Mauro Morandin, S. Otto, A. J. Bevan, T. B. Moore, V. B. Koptchev, S. Passaggio, Ph Leruste, B. Lewandowski, M. G. Wilson, A. Soffer, A. Hocker, S. Ahmed, F. Muheim, D. A. Roberts, F. E. Taylor, R. Barate, W. Kozanecki, J. M. Roney, N. Van Bakel, D. Gamba, S. Schrenk, N. Arnaud, B. Spaan, Luca Lista, A. M. Lutz, G. Vasileiadis, H. Briand, A. D. Bukin, F. Gallo, L. Lanceri, M. T. Graham, Stéphane Plaszczynski, M. Spitznagel, E. Chen, Q. H. Guo, B. Stugu, K. A. George, B. N. Ratcliff, Nicolas Berger, D. A. Hopkins, S. M. Spanier, D. D. Altenburg, D. Dujmic, H. B. Crawley, J. G. Smith, N. D. Qi, R. Schwierz, G. Marchiori, B. Mayer, T. Glanzman, M. Zito, A. E. Blinov, A. Hauke, Colin Jessop, C. C. Young, A. K. Yarritu, M. B. Nikolich, R. F. Schwitters, W. T. Meyer, D. B. MacFarlane, P. Kim, R. Prepost, R. Nogowski, T. M. Hong, S. H. Robertson, D. E. Hutchcroft, J. M. Bauer, R. Messner, C. Dallapiccola, Ch De La Vaissière, Xiang Li, J. J. Hollar, F. Bucci, V. Klose, G. Rong, S. F. Ganzhur, H. R. Band, C. D. Buchanan, V. Eschenburg, W. S. Lockman, Herbert Koch, S. Curry, Q. L. Zeng, P. Taras, N. De Groot, B. Viaud, C. H. Cheng, A. Olivas, M. Weaver, M. R. Convery, P. F. Giraud, G. Schott, J. R. Fry, M. Gaspero, J. C. Dingfelder, R. Baldini-Ferroli, P. J. Oddone, W. Bhimji, R. de Sangro, D. Kirkby, G. Vasseur, S. L. Wu, K. C. Schofield, S. Brunet, H. Kagan, M. Saleem, P. Patteri, M. Verderi, T. Hadig, W. H. Toki, Enrico Robutti, U. Mallik, S. Playfer, C. Cartaro, C. P. O'Grady, M. A. Baak, A. V. Telnov, W. M. Bugg, D. Kovalskyi, K. Koeneke, F. Di Lodovico, Bernard Aubert, Alberto Lusiani, D. J. Bard, R. R. Kofler, A. K. Mohapatra, D. J. Payne, U. Nauenberg, M. Krishnamurthy, D. E. Wagoner, A. Kreisel, A. Samuel, W. O. Ruddick, M. K. Sullivan, Silvano Tosi, M. Pappagallo, A. D'Orazio, Gabriele Simi, C. L. Davis, R. Gamet, F. Blanc, P. S. Jackson, H. P. Paar, J. E. Brau, X. Giroux, M. Haire, J. C. Williams, M. C. Hodgkinson, G. Graziani, Yu. G. Kolomensky, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, J. P. Coleman, J. Chauveau, M. C. Simani, F. Anulli, C. M. Cormack, B. Dahmes, S. Dittongo, P. Lund, R. L. Flack, J. Brose, A. Calcaterra, M. Bondioli, C. Roat, D. P. Stoker, A. Satpathy, R. Claus, Matteo Negrini, Douglas Wright, I. J. Forster, J. H. von Wimmersperg-Toeller, M. Battaglia, P. Grenier, M. Fritsch, S. S. Hertzbach, Y. Groysman, J. A. Kadyk, Chunhui Chen, L. Wilden, G. Lynch, M. L. Kocian, W. A. Wenzel, J. Libby, K. Wang, H. Schröder, S. Luitz, D. C. Williams, D. Dong, M. Chao, I. Eschrich, Claudio Campagnari, Kenji Hamano, I. M. Peruzzi, E. Won, Y. S. Zhu, F. Forti, J. R. Gaillard, G. W. London, T. W. Beck, F. Bianchi, D. D. Brown, A. E. Rubin, A. B. Breon, D. Hufnagel, Pu Wang, G. W. Brandenburg, R. Contri, S. E. Morgan, V. Lepeltier, M. Dickopp, M. Legendre, M. Benayoun, D. Bernard, J. Schwiening, Liliana Teodorescu, X. C. Lou, J. J. Walsh, A. M. Rahimi, T. E. Latham, G. S. Abrams, D. N. Brown, G. D. Lafferty, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, R. K. Yamamoto, G. B. Mohanty, J. A. Ernst, M. G. Green, V. B. Golubev, P. Roudeau, M. Datta, Wouter Verkerke, J. J. Back, Ch Thiebaux, H. Staengle, M. Davier, G. Therin, S. Willocq, Maurizio Pierini, G. Della Ricca, Y. B. Pan, E. P. Solodov, C. K. Lae, G. Rizzo, R. Kowalewski, J. P. Lees, I. Ofte, J. M. Thompson, Paul Jackson, John Allison, V. Lombardo, R. Frey, M. H. Kelsey, T. Abe, J. R. Johnson, U. Egede, G. Sciolla, M. L. Perl, J. T. Boyd, Joseph Izen, J. Schubert, A. Roodman, T. Pulliam, Roland Waldi, F. Ferroni, J. Stelzer, Davide Piccolo, D. A. Bowerman, Paul Fraser Harrison, P. M. Patel, Stephen Robert Wagner, J.H. Panetta, K. R. Schubert, B. T. Meadows, G. Raven, J. I. Yi, M. D. Sokoloff, C. M. Brown, P. R. Burchat, Sw Banerjee, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, K. T. Flood, S. Saremi, R. Sacco, V. E. Ozcan, H. L. Snoek, Yuehong Xie, Y. P. Lau, A. J.S. Smith, A. J. Edwards, K. Suzuki, H. Nicholson, Martino Margoni, S. Pacetti, R. Cowan, S. A. Majewski, G. Mancinelli, A. W. Weidemann, K. Goetzen, H. J. Bulten, J. P. Burke, E. Torrence, P. David, A. N. Yushkov, A. Santroni, I. Narsky, Virginia Azzolini, Y. Karyotakis, T. Held, K. E. Ford, D. Monorchio, H. W. Zhao, P. D. Dauncey, Mirco Andreotti, C. M. Hawkes, G. Nesom, Corrado Angelini, B. Bhuyan, O. L. Buchmueller, V. P. Druzhinin, C. Bozzi, K. Honscheid, C. A. Chavez, A. A. Salnikov, A. Buzzo, R. J. Barlow, N. Chevalier, M. Posocco, Roberto Calabrese, B. C. Shen, L. Del Buono, J. Ocariz, R. Eckmann, T. J. Harrison, J. W. Gary, A. Khan, J. Va'vra, J.J. Reidy, R. S. Dubitzky, J. M. LoSecco, N. B. Sinev, K. A. Ulmer, Francesco Fabozzi, P. C. Bloom, N. S. Knecht, Paul Kyberd, R. Capra, G. W. Morton, M. H. Schune, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, A. Ryd, James R. Wilson, M. Steinke, K. Yi, Mohamed H. Ahmed, U. Langenegger, G. Eigen, F. Safai Tehrani, and F. Simonetto

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, 01 natural sciences, Asymmetry, Particle identification, Particle decay, Crystallography, 0103 physical sciences, CP violation, B meson, 010306 general physics, media_common
Abstract

We present a measurement of the time-dependent CP-violating asymmetry in B{sup 0} {yields} K*{sup 0}{gamma} decays with K*{sup 0} {yields} K{sub S}{sup 0}{pi}{sup 0} based on 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy e{sup +}e{sup -} collider at SLAC. In a sample containing 157 {+-} 16 signal decays, we measure S{sub K*{sup 0}{gamma}} = -0.21 {+-} 0.40 {+-} 0.05 and C{sub K*{sup 0}{gamma}} = -0.40 {+-} 0.23 {+-} 0.03, where the first error is statistical and the second systematic. We also explore B{sup 0} {yields} K{sub S}{sup 0}{pi}{sup 0}{gamma} decays with 1.1 < m{sub K{sub S}{sup 0}{pi}{sup 0}} < 1.8 GeV/c{sup 2} and find 59 {+-} 13 signal events with S{sub K{sub S}{sup 0}{pi}{sup 0}{gamma}} = 0.9 {+-} 1.0 {+-} 0.2 and C{sub K{sub S}{sup 0}{pi}{sup 0}{gamma}} = -1.0 {+-} 0.5 {+-} 0.2.

Published
2005

48. Measurements of theB→Xsγbranching fraction and photon spectrum from a sum of exclusive final states

Author

J. Ocariz, Douglas Wright, I. J. Forster, T. J. Harrison, J. W. Gary, R. C. Field, J. Va'vra, F. Salvatore, J. F. Hirschauer, J.J. Reidy, S. H. Robertson, A. Satpathy, G. Finocchiaro, V. Luth, Corrado Angelini, D. J. Bard, B. Bhuyan, Markus Cristinziani, S. Emery, R. S. Dubitzky, O. L. Buchmueller, Bruce Schumm, J. M. LoSecco, V. B. Golubev, M. S. Alam, V. P. Druzhinin, C. Bozzi, V. Klose, K. Honscheid, Herbert Koch, S. Curry, G. Therin, A. Snyder, C. A. Chavez, P. Kim, A. Buzzo, R. J. Barlow, J. H. von Wimmersperg-Toeller, N. B. Sinev, B. Viaud, Maurizio Pierini, N. Chevalier, M. Posocco, F. Simonetto, F. F. Wilson, G. P. Taylor, S. Pacetti, F. X. Yumiceva, R. Cowan, D. Monorchio, I. Narsky, H. W. Zhao, P. D. Dauncey, Mirco Andreotti, Marcello Rotondo, A. M. Eisner, Hui Li, H. U. Flaecher, A. Zghiche, R. J. Wilson, G. Blaylock, Matteo Rama, M. J.J. John, J. Chauveau, W. F. Mader, R. H. Schindler, C. K. Lae, P. Lund, R. L. Flack, F. Bucci, L. M. Cremaldi, M. Fritsch, S. S. Hertzbach, S. B. Zain, G. De Nardo, G. Rizzo, Y. Groysman, A. J. Hart, L. Wilden, L. Bosisio, S. K. Swain, Shanhui Fan, J. Stelzer, S. Prell, M. M. Macri, S. J. Sekula, A. Jawahery, Sergio Grancagnolo, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, J. Brose, A. Calcaterra, Yu G. Kolomensky, C. Roat, R. Liu, C. Lu, D. Judd, W. Menges, Andrei Gritsan, S. A. Majewski, S. D. Foulkes, G. Cibinetto, Jie Zhang, James H Cochran, L.M. Zhang, S. Otto, C. M. Cormack, M. Bondioli, M. L. Kocian, D. S. Best, Denis Bernard, C. J. Flacco, V. Lombardo, B. Lewandowski, R. Contri, W. D. Hulsbergen, D. P. Stoker, R. Claus, F. Blanc, D. G. Hitlin, P. Rankin, Matteo Negrini, A. Soffer, A. W. Weidemann, Peter Elmer, G. Wagner, R. Aleksan, Y. Karyotakis, B. T. Meadows, F. Gallo, S. Ye, T. C. Petersen, R. Ter-Antonyan, O. Hamon, G. Raven, M. V. Purohit, W. Kozanecki, Bruce Mellado, M. Wittgen, P. J. Clark, J. I. Yi, M. D. Sokoloff, C. M. Brown, M. C. Hodgkinson, A. Oyanguren, Chunhui Chen, A. B. Breon, B. Spaan, T. R. McMahon, T. Piatenko, H. J. Bulten, K. Peters, Nicola Neri, James R. Wilson, H. Briand, C. M. Hawkes, T. Schalk, A. D. Bukin, J. C. Dingfelder, L. Lanceri, J. P. Lees, Stéphane Plaszczynski, P. R. Burchat, R. R. Kofler, M. Krishnamurthy, Michael Kelly, J. L. Ritchie, A. P. Onuchin, P. Roudeau, H. P. Paar, J. E. Brau, M. A. Mazzoni, I. Kitayama, R. Kroeger, E. I. Rosenberg, Brandon L. Hartfiel, J. P. Coleman, G. Wormser, X. Giroux, A. J. Edwards, Maurizio Biasini, M. Spitznagel, A. Lazzaro, T. M. Hong, M. Lu, D. Dong, M. Steinke, K. Yi, R. K. Mommsen, A. Chen, Mohamed H. Ahmed, B. A. Petersen, C. L. Brown, B. N. Ratcliff, D. E. Wagoner, C. Gatto, E. Grauges, C. T. Potter, M. C. Simani, F. Anulli, D. Boutigny, L. Del Buono, N. D. Qi, R. Schwierz, M. G. Wilson, Mario Giorgi, D. Côté, D. Su, S. Morganti, V. Poireau, Sridhara Dasu, A. A. Salnikov, A. T. Watson, R. Eckmann, Wp Vazquez, M. Pioppi, G. S. Abrams, D. A. Roberts, F. E. Taylor, A. N. Yushkov, A. M. Eichenbaum, S. Dittongo, V. Halyo, B. Cheng, W. O. Ruddick, Gabriele Simi, T. Schroeder, M. Piccolo, N. De Groot, E. Won, G. Grosdidier, Y. S. Zhu, C. L. Davis, J. R. Gaillard, V. Lepeltier, L. Gladney, J. M. Thompson, U. Langenegger, H. K. Hadavand, W. Dunwoodie, U. Egede, Hyun-Chul Kim, V. E. Blinov, M. T. Allen, K. Suzuki, C. L. Edgar, K. A. Ulmer, H. Marsiske, C. H. Cheng, Paul Jackson, Owen Rosser Long, R. Faccini, P. Patteri, R. Gamet, A. Höcker, B. Franek, S. Rodier, A. E. Blinov, G. Batignani, C. C. Young, E. Feltresi, M. T. Graham, S. E. Morgan, M. Dickopp, R. Cenci, G. Eigen, M. Benayoun, A. Seiden, J. Biesiada, F. Ferrarotto, A. J. Lankford, F. Le Diberder, G. Sciolla, G. P. Dubois-Felsmann, F. Safai Tehrani, M. Haire, J. C. Williams, P. C. Bloom, W. Gradl, Francesco Fabozzi, J. R. Fry, W. T. Meyer, A. Zallo, C. Hearty, Marcella Bona, G. B. Mohanty, J. Schwiening, J. A. Ernst, E. A. Eckhart, Liliana Teodorescu, X. C. Lou, J. J. Walsh, N. S. Knecht, J. D. Richman, F. Couderc, G. Vasileiadis, M. Mandelkern, Sai-Juan Chen, Paul Kyberd, R. Messner, R. de Sangro, D. W. G. S. Leith, G. Rong, S. L. Wu, T. Held, K. E. Ford, V. Eschenburg, A. M. Rahimi, T. E. Latham, T. Glanzman, A. M. Lutz, D. N. Brown, J. W. Berryhill, R. Andreassen, B. Dahmes, M. Bruinsma, W. J. Wisniewski, H. Nicholson, R. F. Schwitters, D. J. Summers, B. G. Fulsom, P. Taras, E. P. Solodov, S. Brunet, W. N. Cottingham, W. H. Toki, R. Capra, M. L. Perl, M. Datta, D. B. MacFarlane, C. A. Heusch, S. Ricciardi, J. T. Boyd, Wouter Verkerke, Eleonora Luppi, D. Fortin, J. J. Back, G. D. Lafferty, Alexis Pompili, Tetiana Hryn'ova, Justin Albert, M. K. Sullivan, G. W. Morton, S. Jayatilleke, J. Marks, M. H. Schune, A. D'Orazio, U. Uwer, Pierluigi Paolucci, M. Gaspero, Martino Margoni, Joseph Izen, T. Brandt, R. Stroili, H. A. Neal, K. T. Flood, J. E. Sundermann, G. Mancinelli, G. Nesom, Colin Jessop, Ch Thiebaux, G. A. Cowan, H. Schröder, G. Calderini, H. Staengle, J. Libby, K. Wang, Julie Malcles, R. Prepost, R. G. Jacobsen, A. Ryd, S. Luitz, S. Passaggio, R. Nogowski, M. Bomben, S. Saremi, R. J. Sobie, N. Danielson, F. Galeazzi, K. Goetzen, D. C. Williams, Xiang Li, M. Pripstein, C. D. Buchanan, V. B. Koptchev, A. Roodman, A. Perazzo, Marco Battaglia, C. Voena, R. Sacco, L. Vitale, A. Stocchi, M. Chao, John Allison, A. Olivas, M. Weaver, G. Benelli, I. Eschrich, K. K. Gan, S. Ahmed, N. Van Bakel, D. Gamba, S. Schrenk, F. Martinez-Vidal, Dominik Müller, T. Pulliam, G. Lynch, Kenji Hamano, S. Willocq, G. Della Ricca, H. L. Snoek, W.A. Wenzel, R. Baldini-Ferroli, W. Bhimji, D. Kirkby, G. Vasseur, E. A. Kravchenko, J. P. Burke, E. Torrence, P. David, J. Schubert, Davide Piccolo, K. C. Schofield, E. O. Olaiya, Roland Waldi, M. A. Saeed, C. Voci, N. R. Barlow, F. Ferroni, Claudio Campagnari, E. Chen, Q. H. Guo, B. Stugu, F. Palombo, Junqiao Wu, Vivek Sharma, Y. B. Pan, V. E. Ozcan, R. Kowalewski, D. Dujmic, James D. Olsen, Q. K. Wong, G. W. Brandenburg, M. S. Gill, Yuehong Xie, M. Legendre, Pierre-Francois Giraud, A. Santroni, Virginia Azzolini, L. Li Gioi, G. Marchiori, D. A. Bowerman, Paul Fraser Harrison, Y. P. Lau, S. F. Ganzhur, Crisostomo Sciacca, D. Aston, S. Bettarini, Nicola Cavallo, F. Forti, R. Godang, P. M. Patel, Olga Igonkina, Stephen Robert Wagner, H. M. Lacker, Roberto Covarelli, R. W. Kadel, H. L. Lynch, A. J.S. Smith, J.H. Panetta, A. Palano, S. Schenk, I. Ofte, W. T. Ford, Tim Adye, R. D. Kass, T. B. Moore, Toyoko Orimoto, K. R. Schubert, M. Carpinelli, C. T. Day, M. Barrett, A. Hauke, M. T. Naisbit, Lydia Roos, M. Morganti, D. M. Strom, K. S. Chaisanguanthum, E. Charles, Fabio Cossutti, J. Kroseberg, G. Cavoto, D. Bettoni, R. K. Yamamoto, M. G. Green, Yu I. Skovpen, R. Frey, P. J. Oddone, M. Davier, M. H. Kelsey, T. Abe, J. R. Johnson, T. S. Mattison, D. A. Sanders, P. Tan, C. Hast, D. J. Lange, G. Piredda, A. Dvoretskii, J. C. Chen, M. Morii, Ch Yèche, F. R. Wappler, G. Kukartsev, Maria Roberta Monge, A. Mihalyi, J. A. McKenna, Sh. Rahatlou, E. Paoloni, P. Spradlin, X. R. Chen, H. Kagan, R. Bartoldus, V. Eyges, Zongfu Yu, M. J. Charles, D. del Re, M. Saleem, P. Grenier, J. A. Nash, D. E. Hutchcroft, J. M. Bauer, C. Dallapiccola, Ch De La Vaissière, M. Lo Vetere, J. J. Hollar, Francesco Polci, H. R. Band, W. S. Lockman, M. Pelizaeus, Q. L. Zeng, F. Bellini, M. R. Convery, G. Schott, S. Playfer, C. P. O'Grady, Akram Khan, G. Graziani, J. A. Kadyk, Mauro Morandin, A. J. Bevan, F. Muheim, M. A. Baak, A. V. Telnov, Nicolas Berger, D. A. Hopkins, S. M. Spanier, K. Koeneke, Lluisa-Maria Mir, M. Verderi, T. Hadig, F. Di Lodovico, Bernard Aubert, Enrico Robutti, U. Mallik, A. K. Mohapatra, D. J. Payne, C. Cartaro, A. Kreisel, U. Nauenberg, G. R. Bonneaud, J. Dorfan, A. M. Boyarski, A. Samuel, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, T. Cuhadar-Donszelmann, Ph Leruste, Silvano Tosi, C. Touramanis, N. Arnaud, D. D. Altenburg, B. Mayer, A. K. Yarritu, I. M. Peruzzi, T. W. Beck, S. I. Serednyakov, F. Bianchi, D. D. Brown, A. E. Rubin, D. Hufnagel, Pu Wang, J. Button-Shafer, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, Robert N. Cahn, P. S. Jackson, L. T. Kerth, M. Pappagallo, J. M. Roney, Luca Lista, K. A. George, J. G. Smith, M. B. Nikolich, A. Gaidot, G. P. Gopal, Amanda Weinstein, G. W. London, M. A. Mazur, R. J. Parry, E. Di Marco, D. H. Wright, C. Patrignani, A. Cunha, V. Tisserand, W. Roethel, Michael T Ronan, J. Strube, L. Piemontese, E. Gabathuler, W. R. Innes, F. C. Porter, M. Zito, S. J. Gowdy, R. Barate, Sw. Banerjee, Natalie A. Roe, H. B. Crawley, Roberto Calabrese, and B. C. Shen

Subjects
Quantum chromodynamics, Physics, Semileptonic decay, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Photon energy, 01 natural sciences, Particle identification, Nuclear physics, Isospin, 0103 physical sciences, B meson, 010306 general physics
Abstract

Using 88.9 million BB events collected by the BaBar detector at the Y(4S), we measure the branching fraction for the radiative penguin process B -> X_s gamma from the sum of 38 exclusive final states. The inclusive branching fraction above a minimum photon energy E_gamma > 1.9 GeV is BF (b -> s gamma) = (3.27 +/- 0.18 (stat.) +0.55/-0.40 (syst.) +0.04/-0.09 (theory)) 10^-4. We also measure the isospin asymmetry between B^- -> X_s ubar gamma and B^0bar -> X_s dbar gamma to be Delta_0- = -0.006 +/- 0.058 (stat.) +/- 0.009 (syst.) +/- 0.024 (B^0bar / B^-). The photon energy spectrum is measured in the B rest frame, from which moments are derived for different values of the minimum photon energy. We present fits to the photon spectrum and moments which give the heavy-quark parameters m_b and mu_pi^2. The fitted parameters are consistent with those obtained from semileptonic B -> X_c l nu decays, and are useful inputs for the extraction of Vub from measurements of semileptonic B -> X_u l nu decays.

Published
2005

49. Amplitude analysis of the decayB±→π±π±π∓

Author

F. Simonetto, W. F. Mader, R. H. Schindler, Shanhui Fan, W. Menges, A. J. Edwards, S. Pacetti, R. Cowan, Hyun-Chul Kim, R. Kroeger, K. Suzuki, D. Boutigny, I. Narsky, A. T. Watson, P. Kim, Ch Yèche, G. Kukartsev, Matteo Rama, A. Stocchi, S. J. Sekula, H. Nicholson, A. Jawahery, S. D. Foulkes, G. Cibinetto, R. N. Cahn, Maria Roberta Monge, Michael Kelly, Martino Margoni, A. Mihalyi, S. Prell, F. Bucci, J. L. Ritchie, I. Kitayama, S. I. Serednyakov, S. J. Gowdy, E. Paoloni, M. Verderi, Jie Zhang, James H Cochran, P. Spradlin, X. R. Chen, B. Lewandowski, A. W. Weidemann, T. S. Mattison, D. A. Sanders, A. Soffer, H. J. Bulten, D. Monorchio, A. N. Yushkov, M. T. Ronan, H. K. Hadavand, P. Tan, T. Held, K. E. Ford, T. Hadig, P. Roudeau, Enrico Robutti, Bruce Schumm, R. Aleksan, F. Gallo, A. P. Onuchin, S. Bettarini, A. Chen, L. Li Gioi, C. Hast, D. J. Lange, G. Piredda, A. Dvoretskii, J. C. Chen, C. Hearty, H. W. Zhao, P. D. Dauncey, A. J. Hart, B. A. Petersen, C. L. Brown, E. A. Eckhart, U. Mallik, J. W. Berryhill, R. Andreassen, S. Otto, J. C. Dingfelder, L. Bosisio, Mirco Andreotti, Wp Vazquez, C. Cartaro, R. Barate, M. Pioppi, A. Gaidot, N. De Groot, Sw. Banerjee, Nicola Cavallo, M. Morii, A. V. Gritsan, T. M. Hong, D. J. Summers, B. G. Fulsom, M. S. Gill, R. Bartoldus, R. Messner, B. C. Shen, Pierluigi Paolucci, V. Eyges, Zongfu Yu, Roberto Covarelli, R. W. Kadel, M. J. Charles, R. Calabrese, Colin Jessop, A. B. Breon, M. Bomben, G. Rong, D. del Re, G. P. Gopal, Amanda Weinstein, B. Spaan, Olga Igonkina, C. H. Cheng, R. Prepost, V. Eschenburg, J. R. Fry, F. R. Wappler, W. T. Ford, J. Ocariz, Tim Adye, R. J. Sobie, A. Perazzo, A. Palano, T. B. Moore, H. B. Crawley, B. Cheng, C. Voena, L. Vitale, F. Martinez-Vidal, V. E. Blinov, C. L. Edgar, Dominik Müller, Sh. Rahatlou, P. Taras, N. Danielson, F. Galeazzi, S. Schenk, V. Halyo, P. Lund, R. L. Flack, L. Gladney, K. K. Gan, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, Q. K. Wong, J. A. Nash, J. Brose, M. Lo Vetere, H. Briand, T. J. Harrison, J. W. Gary, A. Calcaterra, A. D. Bukin, F. Di Lodovico, S. E. Morgan, L. Lanceri, R. Nogowski, R. D. Kass, Bernard Aubert, J. Kroseberg, M. Legendre, G. Mancinelli, E. Luppi, M. Dickopp, J. Va'vra, F. Le Diberder, S. Ricciardi, Marcella Bona, Alexis Pompili, Tetiana Hryn'ova, Francesco Polci, Corrado Angelini, Janice Button-Shafer, J. Schwiening, Stéphane Plaszczynski, K. Goetzen, P. C. Bloom, Liliana Teodorescu, X. C. Lou, Mauro Morandin, A. J. Bevan, J. P. Burke, E. Torrence, A. Hauke, M. Gaspero, G. Nesom, P. David, R. Godang, A. K. Mohapatra, D. J. Payne, H. Kagan, M. Saleem, C. D. Buchanan, S. Playfer, W. Roethel, J. Strube, L. Piemontese, G. Cavoto, J. J. Walsh, B. Bhuyan, U. Nauenberg, M. Pelizaeus, C. P. O'Grady, J. D. Richman, A. M. Rahimi, T. E. Latham, T. J. Orimoto, D. Fortin, J. Marks, C. Roat, F. Bellini, D. P. Stoker, F. Muheim, Nicolas Berger, S. Willocq, D. A. Hopkins, S. M. Spanier, G. S. Abrams, A. Samuel, A. Olivas, M. Weaver, Silvano Tosi, R. de Sangro, S. L. Wu, R. Contri, S. Brunet, W. H. Toki, H. M. Lacker, H. L. Lynch, D. N. Brown, M. Barrett, R. Baldini-Ferroli, J. P. Lees, D. M. Strom, M. Spitznagel, K. S. Chaisanguanthum, Pierre-Francois Giraud, A. Santroni, E. Gabathuler, Virginia Azzolini, Akram Khan, D. Côté, W. R. Innes, O. L. Buchmueller, V. P. Druzhinin, C. Bozzi, M. A. Baak, J.J. Reidy, R. S. Dubitzky, W. Bhimji, F. C. Porter, D. Kirkby, G. Vasseur, J. M. LoSecco, L. Del Buono, K. Honscheid, C. A. Chavez, D. W. G. S. Leith, N. S. Knecht, W. N. Cottingham, R. Claus, G. R. Bonneaud, J. Dorfan, A. M. Boyarski, B. N. Ratcliff, G. A. Cowan, R. G. Jacobsen, A. Buzzo, A. V. Telnov, Matteo Negrini, V. Lepeltier, E. Charles, Fabio Cossutti, Douglas Wright, G. D. Lafferty, M. Mandelkern, N. D. Qi, K. Koeneke, R. Schwierz, R. Eckmann, Paul Kyberd, H. Marsiske, K. C. Schofield, N. B. Sinev, R. J. Barlow, N. Chevalier, K. T. Flood, R. R. Kofler, M. Krishnamurthy, G. Della Ricca, Y. B. Pan, R. Kowalewski, V. B. Koptchev, K. A. Ulmer, M. Posocco, M. Benayoun, J. Chauveau, D. S. Best, A. Hocker, S. A. Majewski, P. Grenier, S. Ahmed, N. Van Bakel, D. Gamba, I. J. Forster, D. E. Hutchcroft, J. M. Bauer, C. Dallapiccola, Ch De La Vaissière, D. E. Wagoner, W. O. Ruddick, Gabriele Simi, A. M. Eisner, Hui Li, Yu I. Skovpen, C. M. Cormack, J. J. Hollar, M. Bondioli, S. Schrenk, P. S. Jackson, D. Bettoni, E. J. Hill, P. E. Kutter, P. K. Behera, T. Allmendinger, M. Zito, L. M. Mir, T. R. McMahon, T. Piatenko, Sai-Juan Chen, Denis Bernard, H. R. Band, A. Kreisel, M. Bruinsma, S. Saremi, W. S. Lockman, Sergio Grancagnolo, A. Petzold, J. A. Kadyk, Chunhui Chen, A. E. Blinov, C. C. Young, W. T. Meyer, I. Ofte, W. J. Wisniewski, R. Capra, Y. Karyotakis, G. Calderini, Francesco Fabozzi, G. Vasileiadis, C. L. Davis, Ph Leruste, N. Arnaud, D. D. Altenburg, J. E. Sundermann, E. Chen, Q. H. Guo, B. Stugu, R. Gamet, B. Mayer, D. J. Bard, J. M. Thompson, A. K. Yarritu, D. Dujmic, G. Hamel de Monchenault, R. S. Panvini, E. Grauges, C. T. Potter, Q. L. Zeng, J. M. Roney, D. Dong, Luca Lista, G. Marchiori, R. Sacco, S. Passaggio, H. Schröder, P. J. Clark, S. Luitz, Mario Giorgi, A. Oyanguren, R. C. Field, E. Won, Paul Jackson, D. C. Williams, J. H. von Wimmersperg-Toeller, M. Battaglia, G. W. Morton, M. H. Schune, U. Uwer, W. D. Hulsbergen, S. Morganti, T. Brandt, F. Salvatore, M. V. Purohit, Y. S. Zhu, J. R. Gaillard, R. Stroili, H. A. Neal, K. A. George, Maurizio Biasini, Sridhara Dasu, J. F. Hirschauer, R. K. Mommsen, G. Finocchiaro, V. Luth, M. Chao, M. Haire, J. C. Williams, I. M. Peruzzi, C. M. Hawkes, J. G. Smith, R. Liu, Bruce Mellado, Xiuwan Li, M. Wittgen, M. S. Alam, M. R. Convery, T. Cuhadar-Donszelmann, M. B. Nikolich, Kenji Hamano, A. Snyder, G. Schott, C. Touramanis, H. L. Snoek, E. Feltresi, T. W. Beck, F. Bianchi, F. F. Wilson, H. P. Paar, V. B. Golubev, Owen Rosser Long, A. Seiden, J. E. Brau, A. Ryd, G. W. London, A. A. Salnikov, G. Therin, E. P. Solodov, JunJie Wu, W. Kozanecki, G. B. Mohanty, R. Cenci, D. D. Brown, A. E. Rubin, X. Giroux, A. Zallo, J. A. Ernst, B. Dahmes, G. Grosdidier, M. A. Mazur, R. J. Parry, E. Di Marco, G. W. Brandenburg, F. Couderc, G. Graziani, P. J. Oddone, M. Datta, D. H. Wright, Yuehong Xie, C. Patrignani, A. Cunha, Wouter Verkerke, V. Tisserand, John Allison, D. Hufnagel, J. J. Back, Maurizio Pierini, Pu Wang, Ch Thiebaux, H. Staengle, Yu. G. Kolomensky, A. Satpathy, Julie Malcles, Y. P. Lau, Justin Albert, R. Frey, W. M. Bugg, D. Kovalskyi, M. H. Kelsey, M. Pripstein, Alberto Lusiani, M. Pappagallo, T. Abe, J. R. Johnson, G. Benelli, J. Schubert, Davide Piccolo, S. Jayatilleke, A. J.S. Smith, C. K. Lae, G. Rizzo, M. G. Wilson, D. A. Roberts, V. E. Ozcan, M. Fritsch, S. S. Hertzbach, J. A. McKenna, Y. Groysman, L. Wilden, G. Lynch, F. E. Taylor, A. M. Lutz, M. L. Kocian, James R. Wilson, M. Steinke, K. Yi, M. T. Graham, Mohamed H. Ahmed, W. A. Wenzel, J. Libby, K. Wang, U. Langenegger, T. Glanzman, R. F. Schwitters, G. Eigen, I. Eschrich, D. B. MacFarlane, Claudio Campagnari, J. Stelzer, F. Safai Tehrani, F. Forti, B. T. Meadows, G. Raven, J. I. Yi, M. D. Sokoloff, C. M. Brown, P. Patteri, P. R. Burchat, M. K. Sullivan, A. D'Orazio, S. H. Robertson, S. Emery, V. Klose, Herbert Koch, S. Curry, B. Viaud, V. Lombardo, F. Blanc, U. Egede, G. Sciolla, M. C. Hodgkinson, M. L. Perl, J. T. Boyd, Joseph Izen, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, J. P. Coleman, M. C. Simani, F. Anulli, R. K. Yamamoto, M. G. Green, S. Dittongo, M. Davier, A. Roodman, T. Pulliam, Roland Waldi, F. Ferroni, D. A. Bowerman, Paul Fraser Harrison, P. M. Patel, Stephen Robert Wagner, J.H. Panetta, K. R. Schubert, Markus Cristinziani, F. X. Yumiceva, G. Blaylock, C. A. Heusch, E. A. Kravchenko, C. Voci, S. F. Ganzhur, Crisostomo Sciacca, D. Aston, O. Hamon, A. Lazzaro, D. Su, Peter Elmer, V. Poireau, G. Wagner, M. Piccolo, M. T. Allen, G. Batignani, W. Gradl, K. Peters, M. Lu, A. M. Eichenbaum, M. Macri, G. P. Taylor, M. J.J. John, S. B. Zain, G. De Nardo, C. Lu, D. Judd, C. J. Flacco, E. O. Olaiya, M. A. Saeed, N. R. Barlow, F. Palombo, Vivek Sharma, James D. Olsen, L. T. Kerth, Marcello Rotondo, H. U. Flaecher, A. Zghiche, R. J. Wilson, L. M. Cremaldi, S. K. Swain, L.M. Zhang, D. G. Hitlin, P. Rankin, S. Ye, T. C. Petersen, R. Ter-Antonyan, S. Rodier, Nicola Neri, T. Schalk, M. A. Mazzoni, G. Wormser, C. Gatto, T. Schroeder, W. Dunwoodie, B. Franek, N. A. Roe, and G. P. Dubois-Felsmann

Subjects
Physics, Nuclear and High Energy Physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Dalitz plot, 01 natural sciences, Engineering physics, Particle decay, Crystallography, Amplitude, Pair production, 0103 physical sciences, Pi, B meson, 010306 general physics
Abstract

We present a Dalitz-plot analysis of charmless B+- decays to the final state pi+- pi+- pi-+ using 210 fb^-1 of data recorded by the BABAR experiment at sqrt(s) = 10.58 GeV. We measure the branching fractions B(B+- -> pi+- pi+- pi-+) = (16.2 +- 1.2 +- 0.9) x 10^-6 and B(B+- -> rho^0(770) pi+-) = (8.8 +- 1.0 +- 0.6 +0.1-0.7) x 10^-6. Measurements of branching fractions for the quasi-two-body decays B+- -> rho^0(1450) pi+-, B+- -> f_0(980) pi+- and B+- -> f_2(1270) pi+- are also presented. We observe no charge asymmetries for the above modes, and there is no evidence for the decays B+- -> chic0 pi+-, B+- -> f_0(1370) pi+- and B+- -> sigma pi+-.

Published
2005

50. Measurement of theB+→pp¯K+branching fraction and study of the decay dynamics

Author

R. Nogowski, H. Kagan, M. Saleem, R. Liu, J. M. Roney, Luca Lista, K. A. George, J. G. Smith, M. B. Nikolich, A. J. Edwards, A. W. Weidemann, Xiang Li, F. Di Lodovico, Bernard Aubert, R. Godang, A. K. Mohapatra, D. J. Payne, U. Nauenberg, A. Samuel, Silvano Tosi, P. C. Bloom, R. Contri, H. J. Bulten, C. D. Buchanan, P. S. Jackson, Roberto Calabrese, B. C. Shen, J. Ocariz, Matteo Rama, Hyun-Chul Kim, K. Suzuki, S. Prell, Jie Zhang, W. Kozanecki, J. Chauveau, C. M. Cormack, A. Gaidot, J. Stelzer, S. Playfer, C. P. O'Grady, H. M. Lacker, H. L. Lynch, G. P. Gopal, Amanda Weinstein, A. N. Yushkov, S. Emery, R. Bartoldus, A. Satpathy, B. T. Meadows, V. Lepeltier, Maurizio Biasini, M. P. Kelly, M. Barrett, Peter Elmer, Akram Khan, M. A. Baak, A. V. Telnov, K. Koeneke, P. Patteri, A. Olivas, E. A. Kravchenko, M. Weaver, D. M. Strom, K. S. Chaisanguanthum, N. S. Knecht, Paul Kyberd, R. Capra, M. Bondioli, Denis Bernard, G. Wagner, G. Raven, J. I. Yi, M. D. Sokoloff, C. M. Brown, P. R. Burchat, D. Monorchio, Owen Rosser Long, A. Seiden, G. B. Mohanty, H. W. Zhao, P. D. Dauncey, J. A. Ernst, Mirco Andreotti, M. Datta, James H Cochran, B. Lewandowski, A. Soffer, M. Benayoun, H. Nicholson, J. A. Kadyk, Chunhui Chen, M. Fritsch, S. S. Hertzbach, Y. Groysman, L. Wilden, G. W. Morton, M. H. Schune, Wouter Verkerke, U. Uwer, T. Brandt, R. Stroili, H. A. Neal, A. Ryd, G. Lynch, D. Dong, J. L. Ritchie, I. Kitayama, P. Grenier, H. K. Hadavand, K. Peters, D. E. Hutchcroft, J. M. Bauer, M. Lu, V. Halyo, M. L. Kocian, V. Lombardo, L. Gladney, T. Held, K. E. Ford, J. J. Back, F. Gallo, R. Baldini-Ferroli, C. Dallapiccola, Ch De La Vaissière, J. J. Hollar, T. J. Harrison, J. W. Gary, W. M. Bugg, D. Kovalskyi, Alberto Lusiani, J. Va'vra, M. Pappagallo, Julie Malcles, M. Pripstein, G. Benelli, J. W. Berryhill, E. O. Olaiya, E. Charles, Fabio Cossutti, M. A. Saeed, N. R. Barlow, F. Palombo, M. G. Wilson, D. A. Roberts, W. A. Wenzel, W. Roethel, J. Strube, L. Piemontese, E. Gabathuler, W. R. Innes, F. C. Porter, D. Bettoni, G. P. Taylor, Ch Thiebaux, H. Staengle, J.J. Reidy, Yu I. Skovpen, Junqiao Wu, Vivek Sharma, S. F. Ganzhur, H. R. Band, W. S. Lockman, R. Faccini, J. Biesiada, F. Ferrarotto, A. J. Lankford, R. Andreassen, F. E. Taylor, F. Le Diberder, E. Won, Marcella Bona, Q. L. Zeng, James D. Olsen, A. M. Eichenbaum, Y. S. Zhu, V. Eyges, Zongfu Yu, M. J. Charles, A. M. Lutz, J. Libby, Martino Margoni, T. S. Mattison, D. A. Sanders, L. Li Gioi, James R. Wilson, M. J.J. John, R. Aleksan, S. B. Zain, G. De Nardo, R. S. Dubitzky, J. R. Gaillard, G. W. London, A. B. Breon, M. T. Graham, K. Wang, L. T. Kerth, Pierluigi Paolucci, J. D. Richman, S. E. Morgan, P. Tan, D. del Re, M. R. Convery, H. Schröder, C. Lu, D. Judd, S. Luitz, U. Egede, G. Sciolla, C. J. Flacco, G. Schott, S. Willocq, S. J. Gowdy, V. Lillard, T. M. Hong, G. Della Ricca, Nicola Cavallo, N. Danielson, M. Dickopp, M. Legendre, Wp Vazquez, M. Pioppi, Bruce Schumm, C. Hast, J. M. LoSecco, D. J. Lange, G. Piredda, A. Dvoretskii, J. C. Chen, I. Eschrich, T. J. Orimoto, D. Fortin, M. L. Perl, D. C. Williams, J. Marks, Claudio Campagnari, P. J. Oddone, M. Chao, Janice Button-Shafer, F. Galeazzi, J. Schwiening, R. Messner, R. Barate, K. K. Gan, Sw. Banerjee, G. R. Bonneaud, B. Cheng, M. Morii, Liliana Teodorescu, X. C. Lou, J. J. Walsh, V. E. Blinov, G. Rong, F. Simonetto, T. Glanzman, J. T. Boyd, W. F. Mader, R. H. Schindler, N. De Groot, O. Hamon, G. A. Cowan, Kenji Hamano, Joseph Izen, Y. B. Pan, R. Kowalewski, J. Dorfan, R. F. Schwitters, A. M. Rahimi, T. E. Latham, N. B. Sinev, M. K. Sullivan, V. Eschenburg, A. D'Orazio, F. R. Wappler, J. A. Nash, D. B. MacFarlane, M. Lo Vetere, F. Forti, P. Kim, S. Pacetti, R. Cowan, G. S. Abrams, H. B. Crawley, A. M. Boyarski, S. Ricciardi, Alexis Pompili, Tetiana Hryn'ova, S. A. Majewski, D. N. Brown, P. J. Clark, Mauro Morandin, A. J. Bevan, Sh. Rahatlou, F. Muheim, C. H. Cheng, Shanhui Fan, J. R. Fry, A. Lazzaro, D. Su, P. Taras, E. P. Solodov, M. Carpinelli, M. T. Naisbit, Lydia Roos, M. Morganti, V. Poireau, K. T. Flood, A. J. Hart, Markus Cristinziani, Nicolas Berger, D. A. Hopkins, S. M. Spanier, R. K. Mommsen, R. R. Kofler, M. Krishnamurthy, Francesco Polci, M. Piccolo, Olga Igonkina, F. Bucci, M. T. Allen, A. Oyanguren, I. Narsky, E. J. Hill, G. W. Brandenburg, F. Blanc, I. Ofte, G. D. Lafferty, D. E. Wagoner, D. W. G. S. Leith, P. E. Kutter, P. K. Behera, T. Allmendinger, L. Bosisio, Ph Leruste, W. O. Ruddick, S. Saremi, R. Sacco, S. Rodier, Y. Karyotakis, Gabriele Simi, G. Batignani, S. Bettarini, Corrado Angelini, N. Arnaud, W. N. Cottingham, B. Bhuyan, D. D. Altenburg, H. L. Snoek, F. X. Yumiceva, M. Pelizaeus, M. C. Hodgkinson, W. Gradl, A. Dorigo, C. L. Davis, R. Gamet, M. Mandelkern, B. Mayer, A. K. Yarritu, M. Verderi, T. Cuhadar-Donszelmann, M. A. Mazur, W. T. Ford, G. Blaylock, Yuehong Xie, Tim Adye, R. J. Parry, R. D. Kass, E. Di Marco, O. L. Buchmueller, M. Haire, D. H. Wright, J. C. Williams, R. de Sangro, S. L. Wu, T. Hadig, G. Graziani, G. Calderini, Enrico Robutti, Y. P. Lau, C. Patrignani, A. Cunha, U. Mallik, F. Bellini, V. Tisserand, T. B. Moore, I. M. Peruzzi, V. P. Druzhinin, C. Bozzi, M. Gaspero, C. Touramanis, C. Cartaro, A. J.S. Smith, C. A. Heusch, E. I. Rosenberg, C. T. Day, Brandon L. Hartfiel, B. Dahmes, C. M. Hawkes, P. F. Giraud, J. C. Dingfelder, K. Honscheid, C. A. Chavez, G. Mancinelli, P. Roudeau, R. G. Jacobsen, Ch Yèche, A. Hauke, S. Brunet, W. H. Toki, M. C. Simani, F. Anulli, T. W. Beck, S. I. Serednyakov, F. Bianchi, S. Dittongo, Amir Farbin, R. Frey, V. B. Koptchev, A. Buzzo, A. A. Salnikov, M. H. Kelsey, R. J. Barlow, D. D. Brown, T. Abe, A. E. Rubin, C. Voci, G. Kukartsev, A. Stocchi, R. Kroeger, N. Chevalier, G. Nesom, M. Posocco, J. P. Coleman, R. K. Yamamoto, Crisostomo Sciacca, D. Aston, D. Hufnagel, G. Grosdidier, J. R. Johnson, R. N. Cahn, A. M. Eisner, Maria Roberta Monge, Hui Li, S. H. Robertson, Pu Wang, A. Mihalyi, Sergio Grancagnolo, V. Klose, A. Petzold, G. Hamel de Monchenault, R. S. Panvini, E. Paoloni, K. Goetzen, W. D. Hulsbergen, M. V. Purohit, P. Spradlin, X. R. Chen, M. T. Ronan, D. Boutigny, Herbert Koch, Bruce Mellado, B. Viaud, M. Wittgen, A. Hocker, S. Ahmed, D. Gamba, S. Schrenk, L. Del Buono, R. Eckmann, M. G. Green, A. T. Watson, K. A. Ulmer, M. Davier, E. Chen, Q. H. Guo, B. Stugu, A. Roodman, D. Dujmic, J. P. Burke, E. Torrence, P. David, G. Marchiori, C. Hearty, T. Pulliam, Francesco Fabozzi, E. A. Eckhart, Roland Waldi, F. Ferroni, G. Vasileiadis, D. J. Summers, B. G. Fulsom, A. Santroni, Virginia Azzolini, D. A. Bowerman, Paul Fraser Harrison, M. Bomben, R. J. Sobie, A. Perazzo, C. Voena, P. M. Patel, L. Vitale, F. Martinez-Vidal, Dominik Müller, Stephen Robert Wagner, J.H. Panetta, K. R. Schubert, Q. K. Wong, J. P. Lees, J. M. Thompson, Paul Jackson, V. B. Golubev, G. Therin, Maurizio Pierini, C. K. Lae, G. Rizzo, J. A. McKenna, M. Spitznagel, B. N. Ratcliff, N. D. Qi, R. Schwierz, M. Zito, A. E. Blinov, C. C. Young, W. T. Meyer, S. Otto, B. Spaan, H. Briand, A. D. Bukin, L. Lanceri, Stéphane Plaszczynski, R. C. Field, F. Salvatore, G. Finocchiaro, V. Luth, M. S. Alam, A. Snyder, F. F. Wilson, W. Bhimji, D. Kirkby, G. Vasseur, K. C. Schofield, D. S. Best, L. M. Mir, T. R. McMahon, T. Piatenko, E. Grauges, C. T. Potter, Mario Giorgi, S. Morganti, Sridhara Dasu, E. Feltresi, R. Cenci, A. Zallo, F. Couderc, Eleonora Luppi, T. Schalk, M. A. Mazzoni, G. Wormser, Justin Albert, C. Gatto, T. Schroeder, W. Dunwoodie, B. Franek, N. A. Roe, G. P. Dubois-Felsmann, Marcello Rotondo, H. U. Flaecher, A. Zghiche, R. J. Wilson, S. Jayatilleke, L. M. Cremaldi, S. K. Swain, L.M. Zhang, D. G. Hitlin, P. Rankin, S. Ye, T. C. Petersen, R. Ter-Antonyan, Nicola Neri, H. P. Paar, J. E. Brau, X. Giroux, Yu. G. Kolomensky, Douglas Wright, I. J. Forster, D. J. Bard, J. H. von Wimmersperg-Toeller, M. Battaglia, R. L. Flack, J. Brose, A. Calcaterra, C. Roat, D. P. Stoker, R. Claus, Matteo Negrini, A. V. Gritsan, M. S. Gill, Roberto Covarelli, R. W. Kadel, A. Palano, S. Schenk, J. Kroseberg, G. Cavoto, M. M. Macri, S. J. Sekula, A. Jawahery, S. D. Foulkes, G. Cibinetto, A. P. Onuchin, A. Chen, B. A. Petersen, C. L. Brown, D. Côté, S. Bailey, H. Marsiske, Sai-Juan Chen, M. Bruinsma, W. J. Wisniewski, J. E. Sundermann, S. Passaggio, M. Steinke, K. Yi, Mohamed H. Ahmed, U. Langenegger, G. Eigen, F. Safai Tehrani, John Allison, J. Schubert, Davide Piccolo, V. E. Ozcan, Colin Jessop, and R. Prepost

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Hyperon, Dalitz plot, 01 natural sciences, Particle identification, Pentaquark, Nuclear physics, Particle decay, 0103 physical sciences, B meson, 010306 general physics
Abstract

With a sample of 232x10^6 Upsilon(4S) --> BBbar events collected with the BaBar detector, we study the decay B+ --> p pbar K+ excluding charmonium decays to ppbar. We measure a branching fraction Br(B+ --> p pbar K+)=(6.7+/-0.5+/-0.4)x10^{-6}. An enhancement at low ppbar mass is observed and the Dalitz plot asymmetry suggests dominance of the penguin amplitude in this B decay. We search for a pentaquark candidate Theta*++ decaying into pK+ in the mass range 1.43 to 2.00 GeV/c2 and set limits on Br(B+ --> Theta*++pbar)xBr(Theta*++ --> pK+) at the 10^{-7} level.

Published
2005

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